2 Advanced Linux Sound Architecture - Driver
3 ==========================================
10 To enable ALSA support you need at least to build the kernel with
11 primary sound card support (CONFIG_SOUND). Since ALSA can emulate OSS,
12 you don't have to choose any of the OSS modules.
14 Enable "OSS API emulation" (CONFIG_SND_OSSEMUL) and both OSS mixer and
15 PCM supports if you want to run OSS applications with ALSA.
17 If you want to support the WaveTable functionality on cards such as
18 SB Live! then you need to enable "Sequencer support"
19 (CONFIG_SND_SEQUENCER).
21 To make ALSA debug messages more verbose, enable the "Verbose printk"
22 and "Debug" options. To check for memory leaks, turn on "Debug memory"
23 too. "Debug detection" will add checks for the detection of cards.
25 Please note that all the ALSA ISA drivers support the Linux isapnp API
26 (if the card supports ISA PnP). You don't need to configure the cards
33 This depends on your distribution, but normally you use the /dev/MAKEDEV
34 script to create the necessary device nodes. On some systems you use a
35 script named 'snddevices'.
41 The user can load modules with options. If the module supports more than
42 one card and you have more than one card of the same type then you can
43 specify multiple values for the option separated by commas.
45 Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
50 The core ALSA module. It is used by all ALSA card drivers.
51 It takes the following options which have global effects.
53 major - major number for sound driver
56 - limiting card index for auto-loading (1-8)
58 - For auto-loading more than one card, specify this
59 option together with snd-card-X aliases.
60 slots - Reserve the slot index for the given driver.
61 This option takes multiple strings.
62 See "Module Autoloading Support" section for details.
67 The PCM OSS emulation module.
68 This module takes options which change the mapping of devices.
70 dsp_map - PCM device number maps assigned to the 1st OSS device.
72 adsp_map - PCM device number maps assigned to the 2st OSS device.
75 - Don't block opening busy PCM devices. Default: 1
77 For example, when dsp_map=2, /dev/dsp will be mapped to PCM #2 of
78 the card #0. Similarly, when adsp_map=0, /dev/adsp will be mapped
79 to PCM #0 of the card #0.
80 For changing the second or later card, specify the option with
81 commas, such like "dsp_map=0,1".
83 nonblock_open option is used to change the behavior of the PCM
84 regarding opening the device. When this option is non-zero,
85 opening a busy OSS PCM device won't be blocked but return
86 immediately with EAGAIN (just like O_NONBLOCK flag).
91 This module takes options which change the mapping of devices.
92 similar to those of the snd-pcm-oss module.
94 midi_map - MIDI device number maps assigned to the 1st OSS device.
96 amidi_map - MIDI device number maps assigned to the 2st OSS device.
99 Common parameters for top sound card modules
100 --------------------------------------------
102 Each of top level sound card module takes the following options.
104 index - index (slot #) of sound card
105 - Values: 0 through 31 or negative
106 - If nonnegative, assign that index number
107 - if negative, interpret as a bitmask of permissible
108 indices; the first free permitted index is assigned
110 id - card ID (identifier or name)
111 - Can be up to 15 characters long
112 - Default: the card type
113 - A directory by this name is created under /proc/asound/
114 containing information about the card
115 - This ID can be used instead of the index number in
118 - Default: enabled, for PCI and ISA PnP cards
123 Module for AdLib FM cards.
125 port - port # for OPL chip
127 This module supports multiple cards. It does not support autoprobe, so
128 the port must be specified. For actual AdLib FM cards it will be 0x388.
129 Note that this card does not have PCM support and no mixer; only FM
132 Make sure you have "sbiload" from the alsa-tools package available and,
133 after loading the module, find out the assigned ALSA sequencer port
134 number through "sbiload -l". Example output:
136 Port Client name Port name
137 64:0 OPL2 FM synth OPL2 FM Port
139 Load the std.sb and drums.sb patches also supplied by sbiload:
141 sbiload -p 64:0 std.sb drums.sb
143 If you use this driver to drive an OPL3, you can use std.o3 and drums.o3
144 instead. To have the card produce sound, use aplaymidi from alsa-utils:
146 aplaymidi -p 64:0 foo.mid
151 Module for sound cards based on Analog Devices AD1816A/AD1815 ISA chips.
153 port - port # for AD1816A chip (PnP setup)
154 mpu_port - port # for MPU-401 UART (PnP setup)
155 fm_port - port # for OPL3 (PnP setup)
156 irq - IRQ # for AD1816A chip (PnP setup)
157 mpu_irq - IRQ # for MPU-401 UART (PnP setup)
158 dma1 - first DMA # for AD1816A chip (PnP setup)
159 dma2 - second DMA # for AD1816A chip (PnP setup)
160 clockfreq - Clock frequency for AD1816A chip (default = 0, 33000Hz)
162 This module supports multiple cards, autoprobe and PnP.
167 Module for sound cards based on AD1848/AD1847/CS4248 ISA chips.
169 port - port # for AD1848 chip
170 irq - IRQ # for AD1848 chip
171 dma1 - DMA # for AD1848 chip (0,1,3)
173 This module supports multiple cards. It does not support autoprobe
174 thus main port must be specified!!! Other ports are optional.
176 The power-management is supported.
181 Module for Analog Devices AD1889 chips.
183 ac97_quirk - AC'97 workaround for strange hardware
184 See the description of intel8x0 module for details.
186 This module supports multiple cards.
191 Module for ALi M5451 PCI chip.
193 pcm_channels - Number of hardware channels assigned for PCM
194 spdif - Support SPDIF I/O
197 This module supports one chip and autoprobe.
199 The power-management is supported.
204 Module for sound cards based on Avance Logic ALS100/ALS120 ISA chips.
206 port - port # for ALS100 (SB16) chip (PnP setup)
207 irq - IRQ # for ALS100 (SB16) chip (PnP setup)
208 dma8 - 8-bit DMA # for ALS100 (SB16) chip (PnP setup)
209 dma16 - 16-bit DMA # for ALS100 (SB16) chip (PnP setup)
210 mpu_port - port # for MPU-401 UART (PnP setup)
211 mpu_irq - IRQ # for MPU-401 (PnP setup)
212 fm_port - port # for OPL3 FM (PnP setup)
214 This module supports multiple cards, autoprobe and PnP.
216 The power-management is supported.
221 Module for Avance Logic ALS300 and ALS300+
223 This module supports multiple cards.
225 The power-management is supported.
230 Module for sound cards based on Avance Logic ALS4000 PCI chip.
232 joystick_port - port # for legacy joystick support.
233 0 = disabled (default), 1 = auto-detect
235 This module supports multiple cards, autoprobe and PnP.
237 The power-management is supported.
242 Module for ATI IXP 150/200/250/400 AC97 controllers.
244 ac97_clock - AC'97 clock (default = 48000)
245 ac97_quirk - AC'97 workaround for strange hardware
246 See "AC97 Quirk Option" section below.
247 ac97_codec - Workaround to specify which AC'97 codec
248 instead of probing. If this works for you
249 file a bug with your `lspci -vn` output.
251 -1 -- Default behavior.
252 0-2 -- Use the specified codec.
253 spdif_aclink - S/PDIF transfer over AC-link (default = 1)
255 This module supports one card and autoprobe.
257 ATI IXP has two different methods to control SPDIF output. One is
258 over AC-link and another is over the "direct" SPDIF output. The
259 implementation depends on the motherboard, and you'll need to
260 choose the correct one via spdif_aclink module option.
262 The power-management is supported.
264 Module snd-atiixp-modem
265 -----------------------
267 Module for ATI IXP 150/200/250 AC97 modem controllers.
269 This module supports one card and autoprobe.
271 Note: The default index value of this module is -2, i.e. the first
274 The power-management is supported.
276 Module snd-au8810, snd-au8820, snd-au8830
277 -----------------------------------------
279 Module for Aureal Vortex, Vortex2 and Advantage device.
281 pcifix - Control PCI workarounds
282 0 = Disable all workarounds
283 1 = Force the PCI latency of the Aureal card to 0xff
284 2 = Force the Extend PCI#2 Internal Master for Efficient
285 Handling of Dummy Requests on the VIA KT133 AGP Bridge
286 3 = Force both settings
287 255 = Autodetect what is required (default)
289 This module supports all ADB PCM channels, ac97 mixer, SPDIF, hardware
290 EQ, mpu401, gameport. A3D and wavetable support are still in development.
291 Development and reverse engineering work is being coordinated at
292 http://savannah.nongnu.org/projects/openvortex/
293 SPDIF output has a copy of the AC97 codec output, unless you use the
294 "spdif" pcm device, which allows raw data passthru.
295 The hardware EQ hardware and SPDIF is only present in the Vortex2 and
298 Note: Some ALSA mixer applications don't handle the SPDIF sample rate
299 control correctly. If you have problems regarding this, try
300 another ALSA compliant mixer (alsamixer works).
305 Module for sound cards based on Aztech System AZT2320 ISA chip (PnP only).
307 port - port # for AZT2320 chip (PnP setup)
308 wss_port - port # for WSS (PnP setup)
309 mpu_port - port # for MPU-401 UART (PnP setup)
310 fm_port - FM port # for AZT2320 chip (PnP setup)
311 irq - IRQ # for AZT2320 (WSS) chip (PnP setup)
312 mpu_irq - IRQ # for MPU-401 UART (PnP setup)
313 dma1 - 1st DMA # for AZT2320 (WSS) chip (PnP setup)
314 dma2 - 2nd DMA # for AZT2320 (WSS) chip (PnP setup)
316 This module supports multiple cards, PnP and autoprobe.
318 The power-management is supported.
323 Module for sound cards based on Aztech AZF3328 PCI chip.
325 joystick - Enable joystick (default off)
327 This module supports multiple cards.
332 Module for video cards based on Bt87x chips.
334 digital_rate - Override the default digital rate (Hz)
335 load_all - Load the driver even if the card model isn't known
337 This module supports multiple cards.
339 Note: The default index value of this module is -2, i.e. the first
345 Module for Creative Audigy LS and SB Live 24bit
347 This module supports multiple cards.
353 Module for sound cards based on C-Media CMI8330 ISA chips.
355 wssport - port # for CMI8330 chip (WSS)
356 wssirq - IRQ # for CMI8330 chip (WSS)
357 wssdma - first DMA # for CMI8330 chip (WSS)
358 sbport - port # for CMI8330 chip (SB16)
359 sbirq - IRQ # for CMI8330 chip (SB16)
360 sbdma8 - 8bit DMA # for CMI8330 chip (SB16)
361 sbdma16 - 16bit DMA # for CMI8330 chip (SB16)
363 This module supports multiple cards and autoprobe.
365 The power-management is supported.
370 Module for C-Media CMI8338/8738/8768/8770 PCI sound cards.
372 mpu_port - port address of MIDI interface (8338 only):
373 0x300,0x310,0x320,0x330 = legacy port,
374 0 = disable (default)
375 fm_port - port address of OPL-3 FM synthesizer (8x38 only):
377 1 = integrated PCI port (default on 8738),
379 soft_ac3 - Software-conversion of raw SPDIF packets (model 033 only)
381 joystick_port - Joystick port address (0 = disable, 1 = auto-detect)
383 This module supports autoprobe and multiple cards.
385 The power-management is supported.
390 Module for sound cards based on CS4231 ISA chips.
392 port - port # for CS4231 chip
393 mpu_port - port # for MPU-401 UART (optional), -1 = disable
394 irq - IRQ # for CS4231 chip
395 mpu_irq - IRQ # for MPU-401 UART
396 dma1 - first DMA # for CS4231 chip
397 dma2 - second DMA # for CS4231 chip
399 This module supports multiple cards. This module does not support autoprobe
400 thus main port must be specified!!! Other ports are optional.
402 The power-management is supported.
407 Module for sound cards based on CS4232/CS4232A ISA chips.
409 port - port # for CS4232 chip (PnP setup - 0x534)
410 cport - control port # for CS4232 chip (PnP setup - 0x120,0x210,0xf00)
411 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
412 fm_port - FM port # for CS4232 chip (PnP setup - 0x388), -1 = disable
413 irq - IRQ # for CS4232 chip (5,7,9,11,12,15)
414 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
415 dma1 - first DMA # for CS4232 chip (0,1,3)
416 dma2 - second DMA # for Yamaha CS4232 chip (0,1,3), -1 = disable
417 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
419 This module supports multiple cards. This module does not support autoprobe
420 thus main port must be specified!!! Other ports are optional.
422 The power-management is supported.
427 Module for sound cards based on CS4235/CS4236/CS4236B/CS4237B/
428 CS4238B/CS4239 ISA chips.
430 port - port # for CS4236 chip (PnP setup - 0x534)
431 cport - control port # for CS4236 chip (PnP setup - 0x120,0x210,0xf00)
432 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
433 fm_port - FM port # for CS4236 chip (PnP setup - 0x388), -1 = disable
434 irq - IRQ # for CS4236 chip (5,7,9,11,12,15)
435 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
436 dma1 - first DMA # for CS4236 chip (0,1,3)
437 dma2 - second DMA # for CS4236 chip (0,1,3), -1 = disable
438 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
440 This module supports multiple cards. This module does not support autoprobe
441 (if ISA PnP is not used) thus main port and control port must be
442 specified!!! Other ports are optional.
444 The power-management is supported.
449 Module for Cirrus Logic CS4281 soundchip.
451 dual_codec - Secondary codec ID (0 = disable, default)
453 This module supports multiple cards.
455 The power-management is supported.
460 Module for PCI sound cards based on CS4610/CS4612/CS4614/CS4615/CS4622/
461 CS4624/CS4630/CS4280 PCI chips.
463 external_amp - Force to enable external amplifier.
464 thinkpad - Force to enable Thinkpad's CLKRUN control.
465 mmap_valid - Support OSS mmap mode (default = 0).
467 This module supports multiple cards and autoprobe.
468 Usually external amp and CLKRUN controls are detected automatically
469 from PCI sub vendor/device ids. If they don't work, give the options
472 The power-management is supported.
477 Module for Cyrix/NatSemi Geode 5530 chip.
479 Module snd-cs5535audio
480 ----------------------
482 Module for multifunction CS5535 companion PCI device
484 The power-management is supported.
489 Module for Echoaudio Darla20
491 This module supports multiple cards.
492 The driver requires the firmware loader support on kernel.
497 Module for Echoaudio Darla24
499 This module supports multiple cards.
500 The driver requires the firmware loader support on kernel.
505 Module for Diamond Technologies DT-019X / Avance Logic ALS-007 (PnP
508 port - Port # (PnP setup)
509 mpu_port - Port # for MPU-401 (PnP setup)
510 fm_port - Port # for FM OPL-3 (PnP setup)
511 irq - IRQ # (PnP setup)
512 mpu_irq - IRQ # for MPU-401 (PnP setup)
513 dma8 - DMA # (PnP setup)
515 This module supports multiple cards. This module is enabled only with
518 The power-management is supported.
523 Module for the dummy sound card. This "card" doesn't do any output
524 or input, but you may use this module for any application which
525 requires a sound card (like RealPlayer).
527 The power-management is supported.
532 Module for Echoaudio 3G cards (Gina3G/Layla3G)
534 This module supports multiple cards.
535 The driver requires the firmware loader support on kernel.
540 Module for EMU10K1/EMU10k2 based PCI sound cards.
541 * Sound Blaster Live!
542 * Sound Blaster PCI 512
543 * Emu APS (partially supported)
544 * Sound Blaster Audigy
546 extin - bitmap of available external inputs for FX8010 (see bellow)
547 extout - bitmap of available external outputs for FX8010 (see bellow)
548 seq_ports - allocated sequencer ports (4 by default)
549 max_synth_voices - limit of voices used for wavetable (64 by default)
550 max_buffer_size - specifies the maximum size of wavetable/pcm buffers
551 given in MB unit. Default value is 128.
552 enable_ir - enable IR
554 This module supports multiple cards and autoprobe.
556 Input & Output configurations [extin/extout]
557 * Creative Card wo/Digital out [0x0003/0x1f03]
558 * Creative Card w/Digital out [0x0003/0x1f0f]
559 * Creative Card w/Digital CD in [0x000f/0x1f0f]
560 * Creative Card wo/Digital out + LiveDrive [0x3fc3/0x1fc3]
561 * Creative Card w/Digital out + LiveDrive [0x3fc3/0x1fcf]
562 * Creative Card w/Digital CD in + LiveDrive [0x3fcf/0x1fcf]
563 * Creative Card wo/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
564 * Creative Card w/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
565 * Creative Card w/Digital CD in + Digital I/O 2 [0x0fcf/0x1f0f]
566 * Creative Card 5.1/w Digital out + LiveDrive [0x3fc3/0x1fff]
567 * Creative Card 5.1 (c) 2003 [0x3fc3/0x7cff]
568 * Creative Card all ins and outs [0x3fff/0x7fff]
570 The power-management is supported.
575 Module for Creative Emu10k1X (SB Live Dell OEM version)
577 This module supports multiple cards.
582 Module for Ensoniq AudioPCI ES1370 PCI sound cards.
583 * SoundBlaster PCI 64
584 * SoundBlaster PCI 128
586 joystick - Enable joystick (default off)
588 This module supports multiple cards and autoprobe.
590 The power-management is supported.
595 Module for Ensoniq AudioPCI ES1371 PCI sound cards.
596 * SoundBlaster PCI 64
597 * SoundBlaster PCI 128
598 * SoundBlaster Vibra PCI
600 joystick_port - port # for joystick (0x200,0x208,0x210,0x218),
601 0 = disable (default), 1 = auto-detect
603 This module supports multiple cards and autoprobe.
605 The power-management is supported.
610 Module for sound cards based on ESS ES968 chip (PnP only).
612 port - port # for ES968 (SB8) chip (PnP setup)
613 irq - IRQ # for ES968 (SB8) chip (PnP setup)
614 dma1 - DMA # for ES968 (SB8) chip (PnP setup)
616 This module supports multiple cards, PnP and autoprobe.
618 The power-management is supported.
623 Module for ESS AudioDrive ES-1688 and ES-688 sound cards.
625 port - port # for ES-1688 chip (0x220,0x240,0x260)
626 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
627 irq - IRQ # for ES-1688 chip (5,7,9,10)
628 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
629 dma8 - DMA # for ES-1688 chip (0,1,3)
631 This module supports multiple cards and autoprobe (without MPU-401 port).
636 Module for ESS AudioDrive ES-18xx sound cards.
638 port - port # for ES-18xx chip (0x220,0x240,0x260)
639 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
640 fm_port - port # for FM (optional, not used)
641 irq - IRQ # for ES-18xx chip (5,7,9,10)
642 dma1 - first DMA # for ES-18xx chip (0,1,3)
643 dma2 - first DMA # for ES-18xx chip (0,1,3)
644 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
646 This module supports multiple cards, ISA PnP and autoprobe (without MPU-401
647 port if native ISA PnP routines are not used).
648 When dma2 is equal with dma1, the driver works as half-duplex.
650 The power-management is supported.
655 Module for sound cards based on ESS Solo-1 (ES1938,ES1946) chips.
657 This module supports multiple cards and autoprobe.
659 The power-management is supported.
664 Module for sound cards based on ESS Maestro-1/2/2E (ES1968/ES1978) chips.
666 total_bufsize - total buffer size in kB (1-4096kB)
667 pcm_substreams_p - playback channels (1-8, default=2)
668 pcm_substreams_c - capture channels (1-8, default=0)
669 clock - clock (0 = auto-detection)
670 use_pm - support the power-management (0 = off, 1 = on,
672 enable_mpu - enable MPU401 (0 = off, 1 = on, 2 = auto (default))
673 joystick - enable joystick (default off)
675 This module supports multiple cards and autoprobe.
677 The power-management is supported.
682 Module for ForteMedia FM801 based PCI sound cards.
684 tea575x_tuner - Enable TEA575x tuner
685 - 1 = MediaForte 256-PCS
686 - 2 = MediaForte 256-PCPR
687 - 3 = MediaForte 64-PCR
688 - High 16-bits are video (radio) device number + 1
689 - example: 0x10002 (MediaForte 256-PCPR, device 1)
691 This module supports multiple cards and autoprobe.
693 The power-management is supported.
698 Module for Echoaudio Gina20
700 This module supports multiple cards.
701 The driver requires the firmware loader support on kernel.
706 Module for Echoaudio Gina24
708 This module supports multiple cards.
709 The driver requires the firmware loader support on kernel.
711 Module snd-gusclassic
712 ---------------------
714 Module for Gravis UltraSound Classic sound card.
716 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
717 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
718 dma1 - DMA # for GF1 chip (1,3,5,6,7)
719 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
720 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
721 voices - GF1 voices limit (14-32)
722 pcm_voices - reserved PCM voices
724 This module supports multiple cards and autoprobe.
726 Module snd-gusextreme
727 ---------------------
729 Module for Gravis UltraSound Extreme (Synergy ViperMax) sound card.
731 port - port # for ES-1688 chip (0x220,0x230,0x240,0x250,0x260)
732 gf1_port - port # for GF1 chip (0x210,0x220,0x230,0x240,0x250,0x260,0x270)
733 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable
734 irq - IRQ # for ES-1688 chip (5,7,9,10)
735 gf1_irq - IRQ # for GF1 chip (3,5,9,11,12,15)
736 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
737 dma8 - DMA # for ES-1688 chip (0,1,3)
738 dma1 - DMA # for GF1 chip (1,3,5,6,7)
739 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
740 voices - GF1 voices limit (14-32)
741 pcm_voices - reserved PCM voices
743 This module supports multiple cards and autoprobe (without MPU-401 port).
748 Module for Gravis UltraSound MAX sound card.
750 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
751 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
752 dma1 - DMA # for GF1 chip (1,3,5,6,7)
753 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
754 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
755 voices - GF1 voices limit (14-32)
756 pcm_voices - reserved PCM voices
758 This module supports multiple cards and autoprobe.
763 Module for Intel HD Audio (ICH6, ICH6M, ESB2, ICH7, ICH8),
764 ATI SB450, SB600, RS600,
768 model - force the model name
769 position_fix - Fix DMA pointer (0 = auto, 1 = none, 2 = POSBUF, 3 = FIFO size)
770 probe_mask - Bitmask to probe codecs (default = -1, meaning all slots)
771 single_cmd - Use single immediate commands to communicate with
772 codecs (for debugging only)
773 enable_msi - Enable Message Signaled Interrupt (MSI) (default = off)
774 power_save - Automatic power-saving timtout (in second, 0 =
776 power_save_controller - Reset HD-audio controller in power-saving mode
779 This module supports one card and autoprobe.
781 Each codec may have a model table for different configurations.
782 If your machine isn't listed there, the default (usually minimal)
783 configuration is set up. You can pass "model=<name>" option to
784 specify a certain model in such a case. There are different
785 models depending on the codec chip.
787 Model name Description
788 ---------- -----------
790 3stack 3-jack in back and a headphone out
791 3stack-digout 3-jack in back, a HP out and a SPDIF out
792 5stack 5-jack in back, 2-jack in front
793 5stack-digout 5-jack in back, 2-jack in front, a SPDIF out
794 6stack 6-jack in back, 2-jack in front
795 6stack-digout 6-jack with a SPDIF out
797 z71v 3-jack (HP shared SPDIF)
798 asus 3-jack (ASUS Mobo)
800 asus-dig ASUS with SPDIF out
801 asus-dig2 ASUS with SPDIF out (using GPIO2)
803 fujitsu Fujitsu Laptops (Pi1536)
805 lg LG laptop (m1 express dual)
806 lg-lw LG LW20/LW25 laptop
808 clevo Clevo laptops (m520G, m665n)
809 test for testing/debugging purpose, almost all controls can be
810 adjusted. Appearing only when compiled with
812 auto auto-config reading BIOS (default)
816 hp-3013 HP machines (3013-variant)
817 fujitsu Fujitsu S7020
819 will Will laptops (PB V7900)
820 replacer Replacer 672V
821 basic fixed pin assignment (old default model)
822 auto auto-config reading BIOS (default)
825 fujitsu Fujitsu Laptop
826 hp-bpc HP xw4400/6400/8400/9400 laptops
827 hp-bpc-d7000 HP BPC D7000
828 hp-tc-t5735 HP Thin Client T5735
831 hippo Hippo (ATI) with jack detection, Sony UX-90s
832 hippo_1 Hippo (Benq) with jack detection
833 sony-assamd Sony ASSAMD
834 ultra Samsung Q1 Ultra Vista model
835 basic fixed pin assignment w/o SPDIF
836 auto auto-config reading BIOS (default)
842 auto auto-config reading BIOS (default)
845 3stack-dig 3-stack (2-channel) with SPDIF
846 3stack-6ch 3-stack (6-channel)
847 3stack-6ch-dig 3-stack (6-channel) with SPDIF
848 6stack-dig 6-stack with SPDIF
849 lenovo-101e Lenovo laptop
850 eeepc-p701 ASUS Eeepc
851 auto auto-config reading BIOS (default)
854 3stack-dig 3-jack with SPDIF I/O
855 6stack-dig 6-jack digital with SPDIF I/O
857 targa Targa T8, MSI-1049 T8
860 macpro MacPro support
861 mbp3 Macbook Pro rev3
862 imac24 iMac 24'' with jack detection
864 auto auto-config reading BIOS (default)
867 3stack-dig 3-jack with SPDIF I/O
868 6stack-dig 6-jack digital with SPDIF I/O
869 3stack-6ch 3-jack 6-channel
870 3stack-6ch-dig 3-jack 6-channel with SPDIF I/O
871 6stack-dig-demo 6-jack digital for Intel demo board
872 acer Acer laptops (Travelmate 3012WTMi, Aspire 5600, etc)
873 acer-aspire Acer Aspire 9810
874 medion Medion Laptops
875 medion-md2 Medion MD2
877 targa-2ch-dig Targs/MSI with 2-channel
878 laptop-eapd 3-jack with SPDIF I/O and EAPD (Clevo M540JE, M550JE)
879 lenovo-101e Lenovo 101E
880 lenovo-nb0763 Lenovo NB0763
881 lenovo-ms7195-dig Lenovo MS7195
883 6stack-hp HP machines with 6stack (Nettle boards)
884 3stack-hp HP machines with 3stack (Lucknow, Samba boards)
885 auto auto-config reading BIOS (default)
889 3stack-dig 3-jack with SPDIF I/O
890 6stack-dig 6-jack with SPDIF I/O
891 3stack-660 3-jack (for ALC660)
892 uniwill-m31 Uniwill M31 laptop
893 toshiba Toshiba laptop support
894 asus Asus laptop support
895 asus-laptop ASUS F2/F3 laptops
896 auto auto-config reading BIOS (default)
900 3stack-dig 3-jack with SPDIF OUT
901 6stack-dig 6-jack with SPDIF OUT
902 3stack-660 3-jack (for ALC660VD)
903 3stack-660-digout 3-jack with SPDIF OUT (for ALC660VD)
904 lenovo Lenovo 3000 C200
905 dallas Dallas laptops
907 auto auto-config reading BIOS (default)
910 minimal 3-jack in back
911 min_fp 3-jack in back, 2-jack in front
912 full 6-jack in back, 2-jack in front
913 full_dig 6-jack in back, 2-jack in front, SPDIF I/O
914 allout 5-jack in back, 2-jack in front, SPDIF out
915 auto auto-config reading BIOS (default)
918 3stack 3-stack mode (default)
925 basic 3-jack (default)
927 thinkpad Lenovo Thinkpad T60/X60/Z60
934 basic default configuration
935 thinkpad Lenovo Thinkpad T61/X61
938 6stack 6-jack, separate surrounds (default)
939 3stack 3-stack, shared surrounds
940 laptop 2-channel only (FSC V2060, Samsung M50)
941 laptop-eapd 2-channel with EAPD (Samsung R65, ASUS A6J)
942 laptop-automute 2-channel with EAPD and HP-automute (Lenovo N100)
943 ultra 2-channel with EAPD (Samsung Ultra tablet PC)
947 6stack-dig ditto with SPDIF
949 3stack-dig ditto with SPDIF
950 laptop 3-jack with hp-jack automute
951 laptop-dig ditto with SPDIF
952 auto auto-config reading BIOS (default)
956 test for testing/debugging purpose, almost all controls
957 can be adjusted. Appearing only when compiled with
961 laptop Basic Laptop config
962 laptop-hp Laptop config for some HP models (subdevice 30A5)
963 laptop-eapd Laptop config with EAPD support
964 test for testing/debugging purpose, almost all controls
965 can be adjusted. Appearing only when compiled with
970 dell-d21 Dell (unknown)
971 dell-d22 Dell (unknown)
972 dell-d23 Dell (unknown)
973 dell-m21 Dell Inspiron 630m, Dell Inspiron 640m
974 dell-m22 Dell Latitude D620, Dell Latitude D820
975 dell-m23 Dell XPS M1710, Dell Precision M90
976 dell-m24 Dell Latitude 120L
977 dell-m25 Dell Inspiron E1505n
978 dell-m26 Dell Inspiron 1501
979 dell-m27 Dell Inspiron E1705/9400
980 gateway Gateway laptops with EAPD control
984 dell-m42 Dell (unknown)
985 dell-m43 Dell Precision
986 dell-m44 Dell Inspiron
991 5stack D945 5stack + SPDIF
992 intel-mac-v1 Intel Mac Type 1
993 intel-mac-v2 Intel Mac Type 2
994 intel-mac-v3 Intel Mac Type 3
995 intel-mac-v4 Intel Mac Type 4
996 intel-mac-v5 Intel Mac Type 5
997 macmini Intel Mac Mini (equivalent with type 3)
998 macbook Intel Mac Book (eq. type 5)
999 macbook-pro-v1 Intel Mac Book Pro 1st generation (eq. type 3)
1000 macbook-pro Intel Mac Book Pro 2nd generation (eq. type 3)
1001 imac-intel Intel iMac (eq. type 2)
1002 imac-intel-20 Intel iMac (newer version) (eq. type 3)
1003 dell-d81 Dell (unknown)
1004 dell-d82 Dell (unknown)
1005 dell-m81 Dell (unknown)
1006 dell-m82 Dell XPS M1210
1009 ref Reference board, base config
1010 m2-2 Some Gateway MX series laptops
1011 m6 Some Gateway NX series laptops
1012 pa6 Gateway NX860 series
1014 STAC9227/9228/9229/927x
1017 5stack D965 5stack + SPDIF
1018 dell-3stack Dell Dimension E520
1021 vaio Setup for VAIO FE550G/SZ110
1022 vaio-ar Setup for VAIO AR
1024 The model name "genric" is treated as a special case. When this
1025 model is given, the driver uses the generic codec parser without
1026 "codec-patch". It's sometimes good for testing and debugging.
1028 If the default configuration doesn't work and one of the above
1029 matches with your device, report it together with the PCI
1030 subsystem ID (output of "lspci -nv") to ALSA BTS or alsa-devel
1031 ML (see the section "Links and Addresses").
1033 power_save and power_save_controller options are for power-saving
1034 mode. See powersave.txt for details.
1036 Note 2: If you get click noises on output, try the module option
1037 position_fix=1 or 2. position_fix=1 will use the SD_LPIB
1038 register value without FIFO size correction as the current
1039 DMA pointer. position_fix=2 will make the driver to use
1040 the position buffer instead of reading SD_LPIB register.
1041 (Usually SD_LPLIB register is more accurate than the
1044 NB: If you get many "azx_get_response timeout" messages at
1045 loading, it's likely a problem of interrupts (e.g. ACPI irq
1046 routing). Try to boot with options like "pci=noacpi". Also, you
1047 can try "single_cmd=1" module option. This will switch the
1048 communication method between HDA controller and codecs to the
1049 single immediate commands instead of CORB/RIRB. Basically, the
1050 single command mode is provided only for BIOS, and you won't get
1051 unsolicited events, too. But, at least, this works independently
1052 from the irq. Remember this is a last resort, and should be
1053 avoided as much as possible...
1055 MORE NOTES ON "azx_get_response timeout" PROBLEMS:
1056 On some hardwares, you may need to add a proper probe_mask option
1057 to avoid the "azx_get_response timeout" problem above, instead.
1058 This occurs when the access to non-existing or non-working codec slot
1059 (likely a modem one) causes a stall of the communication via HD-audio
1060 bus. You can see which codec slots are probed by enabling
1061 CONFIG_SND_DEBUG_DETECT, or simply from the file name of the codec
1062 proc files. Then limit the slots to probe by probe_mask option.
1063 For example, probe_mask=1 means to probe only the first slot, and
1064 probe_mask=4 means only the third slot.
1066 The power-management is supported.
1071 Module for RME Hammerfall DSP audio interface(s)
1073 This module supports multiple cards.
1075 Note: The firmware data can be automatically loaded via hotplug
1076 when CONFIG_FW_LOADER is set. Otherwise, you need to load
1077 the firmware via hdsploader utility included in alsa-tools
1079 The firmware data is found in alsa-firmware package.
1081 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1082 module did formerly. It will allocate the buffers in advance
1083 when any HDSP cards are found. To make the buffer
1084 allocation sure, load snd-page-alloc module in the early
1085 stage of boot sequence. See "Early Buffer Allocation"
1091 Module for RME HDSP MADI board.
1093 precise_ptr - Enable precise pointer, or disable.
1094 line_outs_monitor - Send playback streams to analog outs by default.
1095 enable_monitor - Enable Analog Out on Channel 63/64 by default.
1097 See hdspm.txt for details.
1102 Module for Envy24 (ICE1712) based PCI sound cards.
1103 * MidiMan M Audio Delta 1010
1104 * MidiMan M Audio Delta 1010LT
1105 * MidiMan M Audio Delta DiO 2496
1106 * MidiMan M Audio Delta 66
1107 * MidiMan M Audio Delta 44
1108 * MidiMan M Audio Delta 410
1109 * MidiMan M Audio Audiophile 2496
1112 * TerraTec EWX 24/96
1113 * TerraTec DMX 6Fire
1115 * Hoontech SoundTrack DSP 24
1116 * Hoontech SoundTrack DSP 24 Value
1117 * Hoontech SoundTrack DSP 24 Media 7.1
1118 * Event Electronics, EZ8
1120 * Lionstracs, Mediastaton
1122 model - Use the given board model, one of the following:
1123 delta1010, dio2496, delta66, delta44, audiophile, delta410,
1124 delta1010lt, vx442, ewx2496, ews88mt, ews88mt_new, ews88d,
1125 dmx6fire, dsp24, dsp24_value, dsp24_71, ez8,
1126 phase88, mediastation
1127 omni - Omni I/O support for MidiMan M-Audio Delta44/66
1128 cs8427_timeout - reset timeout for the CS8427 chip (S/PDIF transceiver)
1129 in msec resolution, default value is 500 (0.5 sec)
1131 This module supports multiple cards and autoprobe. Note: The consumer part
1132 is not used with all Envy24 based cards (for example in the MidiMan Delta
1135 Note: The supported board is detected by reading EEPROM or PCI
1136 SSID (if EEPROM isn't available). You can override the
1137 model by passing "model" module option in case that the
1138 driver isn't configured properly or you want to try another
1144 Module for Envy24HT (VT/ICE1724), Envy24PT (VT1720) based PCI sound cards.
1145 * MidiMan M Audio Revolution 5.1
1146 * MidiMan M Audio Revolution 7.1
1147 * MidiMan M Audio Audiophile 192
1149 * TerraTec Aureon 5.1 Sky
1150 * TerraTec Aureon 7.1 Space
1151 * TerraTec Aureon 7.1 Universe
1154 * AudioTrak Prodigy 7.1
1155 * AudioTrak Prodigy 7.1LT
1156 * AudioTrak Prodigy 192
1158 * Albatron K8X800 Pro II
1159 * Chaintech ZNF3-150
1160 * Chaintech ZNF3-250
1167 model - Use the given board model, one of the following:
1168 revo51, revo71, amp2000, prodigy71, prodigy71lt,
1169 prodigy192, aureon51, aureon71, universe, ap192,
1170 k8x800, phase22, phase28, ms300, av710, se200pci,
1173 This module supports multiple cards and autoprobe.
1175 Note: The supported board is detected by reading EEPROM or PCI
1176 SSID (if EEPROM isn't available). You can override the
1177 model by passing "model" module option in case that the
1178 driver isn't configured properly or you want to try another
1184 Module for Echoaudio Indigo
1186 This module supports multiple cards.
1187 The driver requires the firmware loader support on kernel.
1192 Module for Echoaudio Indigo DJ
1194 This module supports multiple cards.
1195 The driver requires the firmware loader support on kernel.
1200 Module for Echoaudio Indigo IO
1202 This module supports multiple cards.
1203 The driver requires the firmware loader support on kernel.
1208 Module for AC'97 motherboards from Intel and compatibles.
1209 * Intel i810/810E, i815, i820, i830, i84x, MX440
1210 ICH5, ICH6, ICH7, ESB2
1211 * SiS 7012 (SiS 735)
1212 * NVidia NForce, NForce2, NForce3, MCP04, CK804
1214 * AMD AMD768, AMD8111
1217 ac97_clock - AC'97 codec clock base (0 = auto-detect)
1218 ac97_quirk - AC'97 workaround for strange hardware
1219 See "AC97 Quirk Option" section below.
1220 buggy_irq - Enable workaround for buggy interrupts on some
1221 motherboards (default yes on nForce chips,
1223 buggy_semaphore - Enable workaround for hardwares with buggy
1224 semaphores (e.g. on some ASUS laptops)
1226 spdif_aclink - Use S/PDIF over AC-link instead of direct connection
1227 from the controller chip
1228 (0 = off, 1 = on, -1 = default)
1230 This module supports one chip and autoprobe.
1232 Note: the latest driver supports auto-detection of chip clock.
1233 if you still encounter too fast playback, specify the clock
1234 explicitly via the module option "ac97_clock=41194".
1236 Joystick/MIDI ports are not supported by this driver. If your
1237 motherboard has these devices, use the ns558 or snd-mpu401
1238 modules, respectively.
1240 The power-management is supported.
1242 Module snd-intel8x0m
1243 --------------------
1245 Module for Intel ICH (i8x0) chipset MC97 modems.
1246 * Intel i810/810E, i815, i820, i830, i84x, MX440
1248 * SiS 7013 (SiS 735)
1249 * NVidia NForce, NForce2, NForce2s, NForce3
1253 ac97_clock - AC'97 codec clock base (0 = auto-detect)
1255 This module supports one card and autoprobe.
1257 Note: The default index value of this module is -2, i.e. the first
1260 The power-management is supported.
1262 Module snd-interwave
1263 --------------------
1265 Module for Gravis UltraSound PnP, Dynasonic 3-D/Pro, STB Sound Rage 32
1266 and other sound cards based on AMD InterWave (tm) chip.
1268 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
1269 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
1270 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
1271 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
1272 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
1273 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
1274 pcm_voices - reserved PCM voices for the synthesizer (default 2)
1275 effect - 1 = InterWave effects enable (default 0);
1278 This module supports multiple cards, autoprobe and ISA PnP.
1280 Module snd-interwave-stb
1281 ------------------------
1283 Module for UltraSound 32-Pro (sound card from STB used by Compaq)
1284 and other sound cards based on AMD InterWave (tm) chip with TEA6330T
1285 circuit for extended control of bass, treble and master volume.
1287 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
1288 port_tc - tone control (i2c bus) port # for TEA6330T chip (0x350,0x360,0x370,0x380)
1289 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
1290 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
1291 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
1292 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
1293 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
1294 pcm_voices - reserved PCM voices for the synthesizer (default 2)
1295 effect - 1 = InterWave effects enable (default 0);
1298 This module supports multiple cards, autoprobe and ISA PnP.
1303 Module for Korg 1212 IO PCI card
1305 This module supports multiple cards.
1310 Module for Echoaudio Layla20
1312 This module supports multiple cards.
1313 The driver requires the firmware loader support on kernel.
1318 Module for Echoaudio Layla24
1320 This module supports multiple cards.
1321 The driver requires the firmware loader support on kernel.
1326 Module for Allegro/Maestro3 chips
1328 external_amp - enable external amp (enabled by default)
1329 amp_gpio - GPIO pin number for external amp (0-15) or
1330 -1 for default pin (8 for allegro, 1 for
1333 This module supports autoprobe and multiple chips.
1335 Note: the binding of amplifier is dependent on hardware.
1336 If there is no sound even though all channels are unmuted, try to
1337 specify other gpio connection via amp_gpio option.
1338 For example, a Panasonic notebook might need "amp_gpio=0x0d"
1341 The power-management is supported.
1346 Module for Echoaudio Mia
1348 This module supports multiple cards.
1349 The driver requires the firmware loader support on kernel.
1354 Module for Miro soundcards: miroSOUND PCM 1 pro,
1356 miroSOUND PCM 20 Radio.
1358 port - Port # (0x530,0x604,0xe80,0xf40)
1359 irq - IRQ # (5,7,9,10,11)
1360 dma1 - 1st dma # (0,1,3)
1361 dma2 - 2nd dma # (0,1)
1362 mpu_port - MPU-401 port # (0x300,0x310,0x320,0x330)
1363 mpu_irq - MPU-401 irq # (5,7,9,10)
1364 fm_port - FM Port # (0x388)
1365 wss - enable WSS mode
1366 ide - enable onboard ide support
1371 Module for Digigram miXart8 sound cards.
1373 This module supports multiple cards.
1374 Note: One miXart8 board will be represented as 4 alsa cards.
1375 See MIXART.txt for details.
1377 When the driver is compiled as a module and the hotplug firmware
1378 is supported, the firmware data is loaded via hotplug automatically.
1379 Install the necessary firmware files in alsa-firmware package.
1380 When no hotplug fw loader is available, you need to load the
1381 firmware via mixartloader utility in alsa-tools package.
1386 Module for Echoaudio Mona
1388 This module supports multiple cards.
1389 The driver requires the firmware loader support on kernel.
1394 Module for MPU-401 UART devices.
1396 port - port number or -1 (disable)
1397 irq - IRQ number or -1 (disable)
1398 pnp - PnP detection - 0 = disable, 1 = enable (default)
1400 This module supports multiple devices and PnP.
1405 Module for MOTU MidiTimePiece AV multiport MIDI (on the parallel
1408 port - I/O port # for MTPAV (0x378,0x278, default=0x378)
1409 irq - IRQ # for MTPAV (7,5, default=7)
1410 hwports - number of supported hardware ports, default=8.
1412 Module supports only 1 card. This module has no enable option.
1417 Module for Ego Systems (ESI) Miditerminal 4140
1419 This module supports multiple devices.
1420 Requires parport (CONFIG_PARPORT).
1425 Module for NeoMagic NM256AV/ZX chips
1427 playback_bufsize - max playback frame size in kB (4-128kB)
1428 capture_bufsize - max capture frame size in kB (4-128kB)
1429 force_ac97 - 0 or 1 (disabled by default)
1430 buffer_top - specify buffer top address
1431 use_cache - 0 or 1 (disabled by default)
1432 vaio_hack - alias buffer_top=0x25a800
1433 reset_workaround - enable AC97 RESET workaround for some laptops
1434 reset_workaround2 - enable extended AC97 RESET workaround for some
1437 This module supports one chip and autoprobe.
1439 The power-management is supported.
1441 Note: on some notebooks the buffer address cannot be detected
1442 automatically, or causes hang-up during initialization.
1443 In such a case, specify the buffer top address explicitly via
1444 the buffer_top option.
1446 Sony F250: buffer_top=0x25a800
1447 Sony F270: buffer_top=0x272800
1448 The driver supports only ac97 codec. It's possible to force
1449 to initialize/use ac97 although it's not detected. In such a
1450 case, use force_ac97=1 option - but *NO* guarantee whether it
1453 Note: The NM256 chip can be linked internally with non-AC97
1454 codecs. This driver supports only the AC97 codec, and won't work
1455 with machines with other (most likely CS423x or OPL3SAx) chips,
1456 even though the device is detected in lspci. In such a case, try
1457 other drivers, e.g. snd-cs4232 or snd-opl3sa2. Some has ISA-PnP
1458 but some doesn't have ISA PnP. You'll need to specify isapnp=0
1459 and proper hardware parameters in the case without ISA PnP.
1461 Note: some laptops need a workaround for AC97 RESET. For the
1462 known hardware like Dell Latitude LS and Sony PCG-F305, this
1463 workaround is enabled automatically. For other laptops with a
1464 hard freeze, you can try reset_workaround=1 option.
1466 Note: Dell Latitude CSx laptops have another problem regarding
1467 AC97 RESET. On these laptops, reset_workaround2 option is
1468 turned on as default. This option is worth to try if the
1469 previous reset_workaround option doesn't help.
1471 Note: This driver is really crappy. It's a porting from the
1472 OSS driver, which is a result of black-magic reverse engineering.
1473 The detection of codec will fail if the driver is loaded *after*
1474 X-server as described above. You might be able to force to load
1475 the module, but it may result in hang-up. Hence, make sure that
1476 you load this module *before* X if you encounter this kind of
1482 Module for Yamaha OPL3-SA2/SA3 sound cards.
1484 port - control port # for OPL3-SA chip (0x370)
1485 sb_port - SB port # for OPL3-SA chip (0x220,0x240)
1486 wss_port - WSS port # for OPL3-SA chip (0x530,0xe80,0xf40,0x604)
1487 midi_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1488 fm_port - FM port # for OPL3-SA chip (0x388), -1 = disable
1489 irq - IRQ # for OPL3-SA chip (5,7,9,10)
1490 dma1 - first DMA # for Yamaha OPL3-SA chip (0,1,3)
1491 dma2 - second DMA # for Yamaha OPL3-SA chip (0,1,3), -1 = disable
1492 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1494 This module supports multiple cards and ISA PnP. It does not support
1495 autoprobe (if ISA PnP is not used) thus all ports must be specified!!!
1497 The power-management is supported.
1499 Module snd-opti92x-ad1848
1500 -------------------------
1502 Module for sound cards based on OPTi 82c92x and Analog Devices AD1848 chips.
1503 Module works with OAK Mozart cards as well.
1505 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1506 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1507 fm_port - port # for OPL3 device (0x388)
1508 irq - IRQ # for WSS chip (5,7,9,10,11)
1509 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1510 dma1 - first DMA # for WSS chip (0,1,3)
1512 This module supports only one card, autoprobe and PnP.
1514 Module snd-opti92x-cs4231
1515 -------------------------
1517 Module for sound cards based on OPTi 82c92x and Crystal CS4231 chips.
1519 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1520 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1521 fm_port - port # for OPL3 device (0x388)
1522 irq - IRQ # for WSS chip (5,7,9,10,11)
1523 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1524 dma1 - first DMA # for WSS chip (0,1,3)
1525 dma2 - second DMA # for WSS chip (0,1,3)
1527 This module supports only one card, autoprobe and PnP.
1532 Module for sound cards based on OPTi 82c93x chips.
1534 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1535 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1536 fm_port - port # for OPL3 device (0x388)
1537 irq - IRQ # for WSS chip (5,7,9,10,11)
1538 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1539 dma1 - first DMA # for WSS chip (0,1,3)
1540 dma2 - second DMA # for WSS chip (0,1,3)
1542 This module supports only one card, autoprobe and PnP.
1547 Module for Digigram PCXHR boards
1549 This module supports multiple cards.
1551 Module snd-portman2x4
1552 ---------------------
1554 Module for Midiman Portman 2x4 parallel port MIDI interface
1556 This module supports multiple cards.
1558 Module snd-powermac (on ppc only)
1559 ---------------------------------
1561 Module for PowerMac, iMac and iBook on-board soundchips
1563 enable_beep - enable beep using PCM (enabled as default)
1565 Module supports autoprobe a chip.
1567 Note: the driver may have problems regarding endianess.
1569 The power-management is supported.
1571 Module snd-pxa2xx-ac97 (on arm only)
1572 ------------------------------------
1574 Module for AC97 driver for the Intel PXA2xx chip
1576 For ARM architecture only.
1578 The power-management is supported.
1583 Module for Conexant Riptide chip
1585 joystick_port - Joystick port # (default: 0x200)
1586 mpu_port - MPU401 port # (default: 0x330)
1587 opl3_port - OPL3 port # (default: 0x388)
1589 This module supports multiple cards.
1590 The driver requires the firmware loader support on kernel.
1591 You need to install the firmware file "riptide.hex" to the standard
1592 firmware path (e.g. /lib/firmware).
1597 Module for RME Digi32, Digi32 Pro and Digi32/8 (Sek'd Prodif32,
1598 Prodif96 and Prodif Gold) sound cards.
1600 This module supports multiple cards.
1605 Module for RME Digi96, Digi96/8 and Digi96/8 PRO/PAD/PST sound cards.
1607 This module supports multiple cards.
1612 Module for RME Digi9652 (Hammerfall, Hammerfall-Light) sound cards.
1614 precise_ptr - Enable precise pointer (doesn't work reliably).
1617 This module supports multiple cards.
1619 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1620 module did formerly. It will allocate the buffers in advance
1621 when any RME9652 cards are found. To make the buffer
1622 allocation sure, load snd-page-alloc module in the early
1623 stage of boot sequence. See "Early Buffer Allocation"
1626 Module snd-sa11xx-uda1341 (on arm only)
1627 ---------------------------------------
1629 Module for Philips UDA1341TS on Compaq iPAQ H3600 sound card.
1631 Module supports only one card.
1632 Module has no enable and index options.
1634 The power-management is supported.
1639 Module for 8-bit SoundBlaster cards: SoundBlaster 1.0,
1643 port - port # for SB DSP chip (0x220,0x240,0x260)
1644 irq - IRQ # for SB DSP chip (5,7,9,10)
1645 dma8 - DMA # for SB DSP chip (1,3)
1647 This module supports multiple cards and autoprobe.
1649 The power-management is supported.
1651 Module snd-sb16 and snd-sbawe
1652 -----------------------------
1654 Module for 16-bit SoundBlaster cards: SoundBlaster 16 (PnP),
1655 SoundBlaster AWE 32 (PnP),
1656 SoundBlaster AWE 64 PnP
1658 port - port # for SB DSP 4.x chip (0x220,0x240,0x260)
1659 mpu_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1660 awe_port - base port # for EMU8000 synthesizer (0x620,0x640,0x660)
1661 (snd-sbawe module only)
1662 irq - IRQ # for SB DSP 4.x chip (5,7,9,10)
1663 dma8 - 8-bit DMA # for SB DSP 4.x chip (0,1,3)
1664 dma16 - 16-bit DMA # for SB DSP 4.x chip (5,6,7)
1665 mic_agc - Mic Auto-Gain-Control - 0 = disable, 1 = enable (default)
1666 csp - ASP/CSP chip support - 0 = disable (default), 1 = enable
1667 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1669 This module supports multiple cards, autoprobe and ISA PnP.
1671 Note: To use Vibra16X cards in 16-bit half duplex mode, you must
1672 disable 16bit DMA with dma16 = -1 module parameter.
1673 Also, all Sound Blaster 16 type cards can operate in 16-bit
1674 half duplex mode through 8-bit DMA channel by disabling their
1677 The power-management is supported.
1682 Module for Gallant SC-6000 soundcard.
1684 port - Port # (0x220 or 0x240)
1685 mss_port - MSS Port # (0x530 or 0xe80)
1686 irq - IRQ # (5,7,9,10,11)
1687 mpu_irq - MPU-401 IRQ # (5,7,9,10) ,0 - no MPU-401 irq
1690 This module supports multiple cards.
1692 This card is also known as Audio Excel DSP 16 or Zoltrix AV302.
1697 Module for Aztech Sound Galaxy sound card.
1699 sbport - Port # for SB16 interface (0x220,0x240)
1700 wssport - Port # for WSS interface (0x530,0xe80,0xf40,0x604)
1701 irq - IRQ # (7,9,10,11)
1704 This module supports multiple cards.
1706 The power-management is supported.
1711 Module for ENSONIQ SoundScape PnP cards.
1713 port - Port # (PnP setup)
1714 wss_port - WSS Port # (PnP setup)
1715 irq - IRQ # (PnP setup)
1716 mpu_irq - MPU-401 IRQ # (PnP setup)
1717 dma - DMA # (PnP setup)
1718 dma2 - 2nd DMA # (PnP setup, -1 to disable)
1720 This module supports multiple cards. ISA PnP must be enabled.
1721 You need sscape_ctl tool in alsa-tools package for loading
1724 Module snd-sun-amd7930 (on sparc only)
1725 --------------------------------------
1727 Module for AMD7930 sound chips found on Sparcs.
1729 This module supports multiple cards.
1731 Module snd-sun-cs4231 (on sparc only)
1732 -------------------------------------
1734 Module for CS4231 sound chips found on Sparcs.
1736 This module supports multiple cards.
1738 Module snd-sun-dbri (on sparc only)
1739 -----------------------------------
1741 Module for DBRI sound chips found on Sparcs.
1743 This module supports multiple cards.
1745 Module snd-wavefront
1746 --------------------
1748 Module for Turtle Beach Maui, Tropez and Tropez+ sound cards.
1750 cs4232_pcm_port - Port # for CS4232 PCM interface.
1751 cs4232_pcm_irq - IRQ # for CS4232 PCM interface (5,7,9,11,12,15).
1752 cs4232_mpu_port - Port # for CS4232 MPU-401 interface.
1753 cs4232_mpu_irq - IRQ # for CS4232 MPU-401 interface (9,11,12,15).
1754 use_cs4232_midi - Use CS4232 MPU-401 interface
1755 (inaccessibly located inside your computer)
1756 ics2115_port - Port # for ICS2115
1757 ics2115_irq - IRQ # for ICS2115
1758 fm_port - FM OPL-3 Port #
1759 dma1 - DMA1 # for CS4232 PCM interface.
1760 dma2 - DMA2 # for CS4232 PCM interface.
1761 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1763 The below are options for wavefront_synth features:
1764 wf_raw - Assume that we need to boot the OS (default:no)
1765 If yes, then during driver loading, the state of the board is
1766 ignored, and we reset the board and load the firmware anyway.
1767 fx_raw - Assume that the FX process needs help (default:yes)
1768 If false, we'll leave the FX processor in whatever state it is
1769 when the driver is loaded. The default is to download the
1770 microprogram and associated coefficients to set it up for
1771 "default" operation, whatever that means.
1772 debug_default - Debug parameters for card initialization
1773 wait_usecs - How long to wait without sleeping, usecs
1775 This magic number seems to give pretty optimal throughput
1776 based on my limited experimentation.
1777 If you want to play around with it and find a better value, be
1778 my guest. Remember, the idea is to get a number that causes us
1779 to just busy wait for as many WaveFront commands as possible,
1780 without coming up with a number so large that we hog the whole
1782 Specifically, with this number, out of about 134,000 status
1783 waits, only about 250 result in a sleep.
1784 sleep_interval - How long to sleep when waiting for reply
1786 sleep_tries - How many times to try sleeping during a wait
1788 ospath - Pathname to processed ICS2115 OS firmware
1789 (default:wavefront.os)
1790 The path name of the ISC2115 OS firmware. In the recent
1791 version, it's handled via firmware loader framework, so it
1792 must be installed in the proper path, typically,
1794 reset_time - How long to wait for a reset to take effect
1796 ramcheck_time - How many seconds to wait for the RAM test
1798 osrun_time - How many seconds to wait for the ICS2115 OS
1801 This module supports multiple cards and ISA PnP.
1803 Note: the firmware file "wavefront.os" was located in the earlier
1804 version in /etc. Now it's loaded via firmware loader, and
1805 must be in the proper firmware path, such as /lib/firmware.
1806 Copy (or symlink) the file appropriately if you get an error
1807 regarding firmware downloading after upgrading the kernel.
1809 Module snd-sonicvibes
1810 ---------------------
1812 Module for S3 SonicVibes PCI sound cards.
1813 * PINE Schubert 32 PCI
1815 reverb - Reverb Enable - 1 = enable, 0 = disable (default)
1816 - SoundCard must have onboard SRAM for this.
1817 mge - Mic Gain Enable - 1 = enable, 0 = disable (default)
1819 This module supports multiple cards and autoprobe.
1821 Module snd-serial-u16550
1822 ------------------------
1824 Module for UART16550A serial MIDI ports.
1826 port - port # for UART16550A chip
1827 irq - IRQ # for UART16550A chip, -1 = poll mode
1828 speed - speed in bauds (9600,19200,38400,57600,115200)
1830 base - base for divisor in bauds (57600,115200,230400,460800)
1832 outs - number of MIDI ports in a serial port (1-4)
1834 adaptor - Type of adaptor.
1835 0 = Soundcanvas, 1 = MS-124T, 2 = MS-124W S/A,
1836 3 = MS-124W M/B, 4 = Generic
1838 This module supports multiple cards. This module does not support autoprobe
1839 thus the main port must be specified!!! Other options are optional.
1844 Module for Trident 4DWave DX/NX sound cards.
1845 * Best Union Miss Melody 4DWave PCI
1847 * Warpspeed ONSpeed 4DWave PCI
1850 * CHIC True Sound 4Dwave
1851 * Shark Predator4D-PCI
1852 * Jaton SonicWave 4D
1854 pcm_channels - max channels (voices) reserved for PCM
1855 wavetable_size - max wavetable size in kB (4-?kb)
1857 This module supports multiple cards and autoprobe.
1859 The power-management is supported.
1861 Module snd-usb-audio
1862 --------------------
1864 Module for USB audio and USB MIDI devices.
1866 vid - Vendor ID for the device (optional)
1867 pid - Product ID for the device (optional)
1868 device_setup - Device specific magic number (optional)
1869 - Influence depends on the device
1872 This module supports multiple devices, autoprobe and hotplugging.
1874 Module snd-usb-caiaq
1875 --------------------
1877 Module for caiaq UB audio interfaces,
1878 * Native Instruments RigKontrol2
1879 * Native Instruments Kore Controller
1880 * Native Instruments Audio Kontrol 1
1881 * Native Instruments Audio 8 DJ
1883 This module supports multiple devices, autoprobe and hotplugging.
1885 Module snd-usb-usx2y
1886 --------------------
1888 Module for Tascam USB US-122, US-224 and US-428 devices.
1890 This module supports multiple devices, autoprobe and hotplugging.
1892 Note: you need to load the firmware via usx2yloader utility included
1893 in alsa-tools and alsa-firmware packages.
1898 Module for AC'97 motherboards based on VIA 82C686A/686B, 8233,
1899 8233A, 8233C, 8235, 8237 (south) bridge.
1901 mpu_port - 0x300,0x310,0x320,0x330, otherwise obtain BIOS setup
1903 joystick - Enable joystick (default off) [VIA686A/686B only]
1904 ac97_clock - AC'97 codec clock base (default 48000Hz)
1905 dxs_support - support DXS channels,
1906 0 = auto (default), 1 = enable, 2 = disable,
1907 3 = 48k only, 4 = no VRA, 5 = enable any sample
1908 rate and different sample rates on different
1910 [VIA8233/C, 8235, 8237 only]
1911 ac97_quirk - AC'97 workaround for strange hardware
1912 See "AC97 Quirk Option" section below.
1914 This module supports one chip and autoprobe.
1916 Note: on some SMP motherboards like MSI 694D the interrupts might
1917 not be generated properly. In such a case, please try to
1918 set the SMP (or MPS) version on BIOS to 1.1 instead of
1919 default value 1.4. Then the interrupt number will be
1920 assigned under 15. You might also upgrade your BIOS.
1922 Note: VIA8233/5/7 (not VIA8233A) can support DXS (direct sound)
1923 channels as the first PCM. On these channels, up to 4
1924 streams can be played at the same time, and the controller
1925 can perform sample rate conversion with separate rates for
1927 As default (dxs_support = 0), 48k fixed rate is chosen
1928 except for the known devices since the output is often
1929 noisy except for 48k on some mother boards due to the
1931 Please try once dxs_support=5 and if it works on other
1932 sample rates (e.g. 44.1kHz of mp3 playback), please let us
1933 know the PCI subsystem vendor/device id's (output of
1935 If dxs_support=5 does not work, try dxs_support=4; if it
1936 doesn't work too, try dxs_support=1. (dxs_support=1 is
1937 usually for old motherboards. The correct implemented
1938 board should work with 4 or 5.) If it still doesn't
1939 work and the default setting is ok, dxs_support=3 is the
1940 right choice. If the default setting doesn't work at all,
1941 try dxs_support=2 to disable the DXS channels.
1942 In any cases, please let us know the result and the
1943 subsystem vendor/device ids. See "Links and Addresses"
1946 Note: for the MPU401 on VIA823x, use snd-mpu401 driver
1947 additionally. The mpu_port option is for VIA686 chips only.
1949 The power-management is supported.
1951 Module snd-via82xx-modem
1952 ------------------------
1954 Module for VIA82xx AC97 modem
1956 ac97_clock - AC'97 codec clock base (default 48000Hz)
1958 This module supports one card and autoprobe.
1960 Note: The default index value of this module is -2, i.e. the first
1963 The power-management is supported.
1968 Module for virtual rawmidi devices.
1969 This module creates virtual rawmidi devices which communicate
1970 to the corresponding ALSA sequencer ports.
1972 midi_devs - MIDI devices # (1-4, default=4)
1974 This module supports multiple cards.
1979 Module for Digigram VX-Pocket VX222, V222 v2 and Mic cards.
1981 mic - Enable Microphone on V222 Mic (NYI)
1982 ibl - Capture IBL size. (default = 0, minimum size)
1984 This module supports multiple cards.
1986 When the driver is compiled as a module and the hotplug firmware
1987 is supported, the firmware data is loaded via hotplug automatically.
1988 Install the necessary firmware files in alsa-firmware package.
1989 When no hotplug fw loader is available, you need to load the
1990 firmware via vxloader utility in alsa-tools package. To invoke
1991 vxloader automatically, add the following to /etc/modprobe.conf
1993 install snd-vx222 /sbin/modprobe --first-time -i snd-vx222 && /usr/bin/vxloader
1995 (for 2.2/2.4 kernels, add "post-install /usr/bin/vxloader" to
1996 /etc/modules.conf, instead.)
1997 IBL size defines the interrupts period for PCM. The smaller size
1998 gives smaller latency but leads to more CPU consumption, too.
1999 The size is usually aligned to 126. As default (=0), the smallest
2000 size is chosen. The possible IBL values can be found in
2001 /proc/asound/cardX/vx-status proc file.
2003 The power-management is supported.
2008 Module for Digigram VX-Pocket VX2 and 440 PCMCIA cards.
2010 ibl - Capture IBL size. (default = 0, minimum size)
2012 This module supports multiple cards. The module is compiled only when
2013 PCMCIA is supported on kernel.
2015 With the older 2.6.x kernel, to activate the driver via the card
2016 manager, you'll need to set up /etc/pcmcia/vxpocket.conf. See the
2017 sound/pcmcia/vx/vxpocket.c. 2.6.13 or later kernel requires no
2018 longer require a config file.
2020 When the driver is compiled as a module and the hotplug firmware
2021 is supported, the firmware data is loaded via hotplug automatically.
2022 Install the necessary firmware files in alsa-firmware package.
2023 When no hotplug fw loader is available, you need to load the
2024 firmware via vxloader utility in alsa-tools package.
2026 About capture IBL, see the description of snd-vx222 module.
2028 Note: snd-vxp440 driver is merged to snd-vxpocket driver since
2031 The power-management is supported.
2036 Module for Yamaha PCI chips (YMF72x, YMF74x & YMF75x).
2038 mpu_port - 0x300,0x330,0x332,0x334, 0 (disable) by default,
2039 1 (auto-detect for YMF744/754 only)
2040 fm_port - 0x388,0x398,0x3a0,0x3a8, 0 (disable) by default
2041 1 (auto-detect for YMF744/754 only)
2042 joystick_port - 0x201,0x202,0x204,0x205, 0 (disable) by default,
2044 rear_switch - enable shared rear/line-in switch (bool)
2046 This module supports autoprobe and multiple chips.
2048 The power-management is supported.
2050 Module snd-pdaudiocf
2051 --------------------
2053 Module for Sound Core PDAudioCF sound card.
2055 The power-management is supported.
2061 The ac97_quirk option is used to enable/override the workaround for
2062 specific devices on drivers for on-board AC'97 controllers like
2063 snd-intel8x0. Some hardware have swapped output pins between Master
2064 and Headphone, or Surround (thanks to confusion of AC'97
2065 specifications from version to version :-)
2067 The driver provides the auto-detection of known problematic devices,
2068 but some might be unknown or wrongly detected. In such a case, pass
2069 the proper value with this option.
2071 The following strings are accepted:
2072 - default Don't override the default setting
2073 - none Disable the quirk
2074 - hp_only Bind Master and Headphone controls as a single control
2075 - swap_hp Swap headphone and master controls
2076 - swap_surround Swap master and surround controls
2077 - ad_sharing For AD1985, turn on OMS bit and use headphone
2078 - alc_jack For ALC65x, turn on the jack sense mode
2079 - inv_eapd Inverted EAPD implementation
2080 - mute_led Bind EAPD bit for turning on/off mute LED
2082 For backward compatibility, the corresponding integer value -1, 0,
2083 ... are accepted, too.
2085 For example, if "Master" volume control has no effect on your device
2086 but only "Headphone" does, pass ac97_quirk=hp_only module option.
2089 Configuring Non-ISAPNP Cards
2090 ============================
2092 When the kernel is configured with ISA-PnP support, the modules
2093 supporting the isapnp cards will have module options "isapnp".
2094 If this option is set, *only* the ISA-PnP devices will be probed.
2095 For probing the non ISA-PnP cards, you have to pass "isapnp=0" option
2096 together with the proper i/o and irq configuration.
2098 When the kernel is configured without ISA-PnP support, isapnp option
2099 will be not built in.
2102 Module Autoloading Support
2103 ==========================
2105 The ALSA drivers can be loaded automatically on demand by defining
2106 module aliases. The string 'snd-card-%1' is requested for ALSA native
2107 devices where %i is sound card number from zero to seven.
2109 To auto-load an ALSA driver for OSS services, define the string
2110 'sound-slot-%i' where %i means the slot number for OSS, which
2111 corresponds to the card index of ALSA. Usually, define this
2112 as the same card module.
2114 An example configuration for a single emu10k1 card is like below:
2115 ----- /etc/modprobe.conf
2116 alias snd-card-0 snd-emu10k1
2117 alias sound-slot-0 snd-emu10k1
2118 ----- /etc/modprobe.conf
2120 The available number of auto-loaded sound cards depends on the module
2121 option "cards_limit" of snd module. As default it's set to 1.
2122 To enable the auto-loading of multiple cards, specify the number of
2123 sound cards in that option.
2125 When multiple cards are available, it'd better to specify the index
2126 number for each card via module option, too, so that the order of
2127 cards is kept consistent.
2129 An example configuration for two sound cards is like below:
2131 ----- /etc/modprobe.conf
2133 options snd cards_limit=2
2134 alias snd-card-0 snd-interwave
2135 alias snd-card-1 snd-ens1371
2136 options snd-interwave index=0
2137 options snd-ens1371 index=1
2139 alias sound-slot-0 snd-interwave
2140 alias sound-slot-1 snd-ens1371
2141 ----- /etc/modprobe.conf
2143 In this example, the interwave card is always loaded as the first card
2144 (index 0) and ens1371 as the second (index 1).
2146 Alternative (and new) way to fixate the slot assignment is to use
2147 "slots" option of snd module. In the case above, specify like the
2150 options snd slots=snd-interwave,snd-ens1371
2152 Then, the first slot (#0) is reserved for snd-interwave driver, and
2153 the second (#1) for snd-ens1371. You can omit index option in each
2154 driver if slots option is used (although you can still have them at
2155 the same time as long as they don't conflict).
2157 The slots option is especially useful for avoiding the possible
2158 hot-plugging and the resultant slot conflict. For example, in the
2159 case above again, the first two slots are already reserved. If any
2160 other driver (e.g. snd-usb-audio) is loaded before snd-interwave or
2161 snd-ens1371, it will be assigned to the third or later slot.
2164 ALSA PCM devices to OSS devices mapping
2165 =======================================
2167 /dev/snd/pcmC0D0[c|p] -> /dev/audio0 (/dev/audio) -> minor 4
2168 /dev/snd/pcmC0D0[c|p] -> /dev/dsp0 (/dev/dsp) -> minor 3
2169 /dev/snd/pcmC0D1[c|p] -> /dev/adsp0 (/dev/adsp) -> minor 12
2170 /dev/snd/pcmC1D0[c|p] -> /dev/audio1 -> minor 4+16 = 20
2171 /dev/snd/pcmC1D0[c|p] -> /dev/dsp1 -> minor 3+16 = 19
2172 /dev/snd/pcmC1D1[c|p] -> /dev/adsp1 -> minor 12+16 = 28
2173 /dev/snd/pcmC2D0[c|p] -> /dev/audio2 -> minor 4+32 = 36
2174 /dev/snd/pcmC2D0[c|p] -> /dev/dsp2 -> minor 3+32 = 39
2175 /dev/snd/pcmC2D1[c|p] -> /dev/adsp2 -> minor 12+32 = 44
2177 The first number from /dev/snd/pcmC{X}D{Y}[c|p] expression means
2178 sound card number and second means device number. The ALSA devices
2179 have either 'c' or 'p' suffix indicating the direction, capture and
2180 playback, respectively.
2182 Please note that the device mapping above may be varied via the module
2183 options of snd-pcm-oss module.
2186 Proc interfaces (/proc/asound)
2187 ==============================
2189 /proc/asound/card#/pcm#[cp]/oss
2190 -------------------------------
2191 String "erase" - erase all additional informations about OSS applications
2192 String "<app_name> <fragments> <fragment_size> [<options>]"
2194 <app_name> - name of application with (higher priority) or without path
2195 <fragments> - number of fragments or zero if auto
2196 <fragment_size> - size of fragment in bytes or zero if auto
2197 <options> - optional parameters
2198 - disable the application tries to open a pcm device for
2199 this channel but does not want to use it.
2200 (Cause a bug or mmap needs)
2201 It's good for Quake etc...
2202 - direct don't use plugins
2203 - block force block mode (rvplayer)
2204 - non-block force non-block mode
2205 - whole-frag write only whole fragments (optimization affecting
2207 - no-silence do not fill silence ahead to avoid clicks
2208 - buggy-ptr Returns the whitespace blocks in GETOPTR ioctl
2209 instead of filled blocks
2211 Example: echo "x11amp 128 16384" > /proc/asound/card0/pcm0p/oss
2212 echo "squake 0 0 disable" > /proc/asound/card0/pcm0c/oss
2213 echo "rvplayer 0 0 block" > /proc/asound/card0/pcm0p/oss
2216 Early Buffer Allocation
2217 =======================
2219 Some drivers (e.g. hdsp) require the large contiguous buffers, and
2220 sometimes it's too late to find such spaces when the driver module is
2221 actually loaded due to memory fragmentation. You can pre-allocate the
2222 PCM buffers by loading snd-page-alloc module and write commands to its
2223 proc file in prior, for example, in the early boot stage like
2224 /etc/init.d/*.local scripts.
2226 Reading the proc file /proc/drivers/snd-page-alloc shows the current
2227 usage of page allocation. In writing, you can send the following
2228 commands to the snd-page-alloc driver:
2230 - add VENDOR DEVICE MASK SIZE BUFFERS
2232 VENDOR and DEVICE are PCI vendor and device IDs. They take
2233 integer numbers (0x prefix is needed for the hex).
2234 MASK is the PCI DMA mask. Pass 0 if not restricted.
2235 SIZE is the size of each buffer to allocate. You can pass
2236 k and m suffix for KB and MB. The max number is 16MB.
2237 BUFFERS is the number of buffers to allocate. It must be greater
2238 than 0. The max number is 4.
2242 This will erase the all pre-allocated buffers which are not in
2249 ALSA project homepage
2250 http://www.alsa-project.org
2252 ALSA Bug Tracking System
2253 https://bugtrack.alsa-project.org/bugs/
2256 mailto:alsa-devel@alsa-project.org
projects / firefly-linux-kernel-4.4.55.git / blob