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.
61 - permission mask for dynamic sound device filesystem
62 - This is available only when DEVFS is enabled
64 - E.g.: device_mode=0660
70 The PCM OSS emulation module.
71 This module takes options which change the mapping of devices.
73 dsp_map - PCM device number maps assigned to the 1st OSS device.
75 adsp_map - PCM device number maps assigned to the 2st OSS device.
78 - Don't block opening busy PCM devices. Default: 1
80 For example, when dsp_map=2, /dev/dsp will be mapped to PCM #2 of
81 the card #0. Similarly, when adsp_map=0, /dev/adsp will be mapped
82 to PCM #0 of the card #0.
83 For changing the second or later card, specify the option with
84 commas, such like "dsp_map=0,1".
86 nonblock_open option is used to change the behavior of the PCM
87 regarding opening the device. When this option is non-zero,
88 opening a busy OSS PCM device won't be blocked but return
89 immediately with EAGAIN (just like O_NONBLOCK flag).
94 This module takes options which change the mapping of devices.
95 similar to those of the snd-pcm-oss module.
97 midi_map - MIDI device number maps assigned to the 1st OSS device.
99 amidi_map - MIDI device number maps assigned to the 2st OSS device.
102 Common parameters for top sound card modules
103 --------------------------------------------
105 Each of top level sound card module takes the following options.
107 index - index (slot #) of sound card
108 - Values: 0 through 31 or negative
109 - If nonnegative, assign that index number
110 - if negative, interpret as a bitmask of permissible
111 indices; the first free permitted index is assigned
113 id - card ID (identifier or name)
114 - Can be up to 15 characters long
115 - Default: the card type
116 - A directory by this name is created under /proc/asound/
117 containing information about the card
118 - This ID can be used instead of the index number in
121 - Default: enabled, for PCI and ISA PnP cards
126 Module for sound cards based on Analog Devices AD1816A/AD1815 ISA chips.
128 port - port # for AD1816A chip (PnP setup)
129 mpu_port - port # for MPU-401 UART (PnP setup)
130 fm_port - port # for OPL3 (PnP setup)
131 irq - IRQ # for AD1816A chip (PnP setup)
132 mpu_irq - IRQ # for MPU-401 UART (PnP setup)
133 dma1 - first DMA # for AD1816A chip (PnP setup)
134 dma2 - second DMA # for AD1816A chip (PnP setup)
135 clockfreq - Clock frequency for AD1816A chip (default = 0, 33000Hz)
137 This module supports multiple cards, autoprobe and PnP.
142 Module for sound cards based on AD1848/AD1847/CS4248 ISA chips.
144 port - port # for AD1848 chip
145 irq - IRQ # for AD1848 chip
146 dma1 - DMA # for AD1848 chip (0,1,3)
148 This module supports multiple cards. It does not support autoprobe
149 thus main port must be specified!!! Other ports are optional.
151 The power-management is supported.
156 Module for Analog Devices AD1889 chips.
158 ac97_quirk - AC'97 workaround for strange hardware
159 See the description of intel8x0 module for details.
161 This module supports multiple cards.
166 Module for ALi M5451 PCI chip.
168 pcm_channels - Number of hardware channels assigned for PCM
169 spdif - Support SPDIF I/O
172 This module supports one chip and autoprobe.
174 The power-management is supported.
179 Module for sound cards based on Avance Logic ALS100/ALS120 ISA chips.
181 port - port # for ALS100 (SB16) chip (PnP setup)
182 irq - IRQ # for ALS100 (SB16) chip (PnP setup)
183 dma8 - 8-bit DMA # for ALS100 (SB16) chip (PnP setup)
184 dma16 - 16-bit DMA # for ALS100 (SB16) chip (PnP setup)
185 mpu_port - port # for MPU-401 UART (PnP setup)
186 mpu_irq - IRQ # for MPU-401 (PnP setup)
187 fm_port - port # for OPL3 FM (PnP setup)
189 This module supports multiple cards, autoprobe and PnP.
191 The power-management is supported.
196 Module for sound cards based on Avance Logic ALS4000 PCI chip.
198 joystick_port - port # for legacy joystick support.
199 0 = disabled (default), 1 = auto-detect
201 This module supports multiple cards, autoprobe and PnP.
203 The power-management is supported.
208 Module for ATI IXP 150/200/250/400 AC97 controllers.
210 ac97_clock - AC'97 clock (default = 48000)
211 ac97_quirk - AC'97 workaround for strange hardware
212 See "AC97 Quirk Option" section below.
213 spdif_aclink - S/PDIF transfer over AC-link (default = 1)
215 This module supports one card and autoprobe.
217 ATI IXP has two different methods to control SPDIF output. One is
218 over AC-link and another is over the "direct" SPDIF output. The
219 implementation depends on the motherboard, and you'll need to
220 choose the correct one via spdif_aclink module option.
222 The power-management is supported.
224 Module snd-atiixp-modem
225 -----------------------
227 Module for ATI IXP 150/200/250 AC97 modem controllers.
229 This module supports one card and autoprobe.
231 Note: The default index value of this module is -2, i.e. the first
234 The power-management is supported.
236 Module snd-au8810, snd-au8820, snd-au8830
237 -----------------------------------------
239 Module for Aureal Vortex, Vortex2 and Advantage device.
241 pcifix - Control PCI workarounds
242 0 = Disable all workarounds
243 1 = Force the PCI latency of the Aureal card to 0xff
244 2 = Force the Extend PCI#2 Internal Master for Efficient
245 Handling of Dummy Requests on the VIA KT133 AGP Bridge
246 3 = Force both settings
247 255 = Autodetect what is required (default)
249 This module supports all ADB PCM channels, ac97 mixer, SPDIF, hardware
250 EQ, mpu401, gameport. A3D and wavetable support are still in development.
251 Development and reverse engineering work is being coordinated at
252 http://savannah.nongnu.org/projects/openvortex/
253 SPDIF output has a copy of the AC97 codec output, unless you use the
254 "spdif" pcm device, which allows raw data passthru.
255 The hardware EQ hardware and SPDIF is only present in the Vortex2 and
258 Note: Some ALSA mixer applications don't handle the SPDIF sample rate
259 control correctly. If you have problems regarding this, try
260 another ALSA compliant mixer (alsamixer works).
265 Module for sound cards based on Aztech System AZT2320 ISA chip (PnP only).
267 port - port # for AZT2320 chip (PnP setup)
268 wss_port - port # for WSS (PnP setup)
269 mpu_port - port # for MPU-401 UART (PnP setup)
270 fm_port - FM port # for AZT2320 chip (PnP setup)
271 irq - IRQ # for AZT2320 (WSS) chip (PnP setup)
272 mpu_irq - IRQ # for MPU-401 UART (PnP setup)
273 dma1 - 1st DMA # for AZT2320 (WSS) chip (PnP setup)
274 dma2 - 2nd DMA # for AZT2320 (WSS) chip (PnP setup)
276 This module supports multiple cards, PnP and autoprobe.
278 The power-management is supported.
283 Module for sound cards based on Aztech AZF3328 PCI chip.
285 joystick - Enable joystick (default off)
287 This module supports multiple cards.
292 Module for video cards based on Bt87x chips.
294 digital_rate - Override the default digital rate (Hz)
295 load_all - Load the driver even if the card model isn't known
297 This module supports multiple cards.
299 Note: The default index value of this module is -2, i.e. the first
305 Module for Creative Audigy LS and SB Live 24bit
307 This module supports multiple cards.
313 Module for sound cards based on C-Media CMI8330 ISA chips.
315 wssport - port # for CMI8330 chip (WSS)
316 wssirq - IRQ # for CMI8330 chip (WSS)
317 wssdma - first DMA # for CMI8330 chip (WSS)
318 sbport - port # for CMI8330 chip (SB16)
319 sbirq - IRQ # for CMI8330 chip (SB16)
320 sbdma8 - 8bit DMA # for CMI8330 chip (SB16)
321 sbdma16 - 16bit DMA # for CMI8330 chip (SB16)
323 This module supports multiple cards and autoprobe.
325 The power-management is supported.
330 Module for C-Media CMI8338 and 8738 PCI sound cards.
332 mpu_port - 0x300,0x310,0x320,0x330, 0 = disable (default)
333 fm_port - 0x388 (default), 0 = disable (default)
334 soft_ac3 - Software-conversion of raw SPDIF packets (model 033 only)
336 joystick_port - Joystick port address (0 = disable, 1 = auto-detect)
338 This module supports autoprobe and multiple cards.
340 The power-management is supported.
345 Module for sound cards based on CS4231 ISA chips.
347 port - port # for CS4231 chip
348 mpu_port - port # for MPU-401 UART (optional), -1 = disable
349 irq - IRQ # for CS4231 chip
350 mpu_irq - IRQ # for MPU-401 UART
351 dma1 - first DMA # for CS4231 chip
352 dma2 - second DMA # for CS4231 chip
354 This module supports multiple cards. This module does not support autoprobe
355 thus main port must be specified!!! Other ports are optional.
357 The power-management is supported.
362 Module for sound cards based on CS4232/CS4232A ISA chips.
364 port - port # for CS4232 chip (PnP setup - 0x534)
365 cport - control port # for CS4232 chip (PnP setup - 0x120,0x210,0xf00)
366 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
367 fm_port - FM port # for CS4232 chip (PnP setup - 0x388), -1 = disable
368 irq - IRQ # for CS4232 chip (5,7,9,11,12,15)
369 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
370 dma1 - first DMA # for CS4232 chip (0,1,3)
371 dma2 - second DMA # for Yamaha CS4232 chip (0,1,3), -1 = disable
372 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
374 This module supports multiple cards. This module does not support autoprobe
375 thus main port must be specified!!! Other ports are optional.
377 The power-management is supported.
382 Module for sound cards based on CS4235/CS4236/CS4236B/CS4237B/
383 CS4238B/CS4239 ISA chips.
385 port - port # for CS4236 chip (PnP setup - 0x534)
386 cport - control port # for CS4236 chip (PnP setup - 0x120,0x210,0xf00)
387 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
388 fm_port - FM port # for CS4236 chip (PnP setup - 0x388), -1 = disable
389 irq - IRQ # for CS4236 chip (5,7,9,11,12,15)
390 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
391 dma1 - first DMA # for CS4236 chip (0,1,3)
392 dma2 - second DMA # for CS4236 chip (0,1,3), -1 = disable
393 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
395 This module supports multiple cards. This module does not support autoprobe
396 (if ISA PnP is not used) thus main port and control port must be
397 specified!!! Other ports are optional.
399 The power-management is supported.
404 Module for Cirrus Logic CS4281 soundchip.
406 dual_codec - Secondary codec ID (0 = disable, default)
408 This module supports multiple cards.
410 The power-management is supported.
415 Module for PCI sound cards based on CS4610/CS4612/CS4614/CS4615/CS4622/
416 CS4624/CS4630/CS4280 PCI chips.
418 external_amp - Force to enable external amplifier.
419 thinkpad - Force to enable Thinkpad's CLKRUN control.
420 mmap_valid - Support OSS mmap mode (default = 0).
422 This module supports multiple cards and autoprobe.
423 Usually external amp and CLKRUN controls are detected automatically
424 from PCI sub vendor/device ids. If they don't work, give the options
427 The power-management is supported.
429 Module snd-cs5535audio
430 ----------------------
432 Module for multifunction CS5535 companion PCI device
434 This module supports multiple cards.
439 Module for Echoaudio Darla20
441 This module supports multiple cards.
442 The driver requires the firmware loader support on kernel.
447 Module for Echoaudio Darla24
449 This module supports multiple cards.
450 The driver requires the firmware loader support on kernel.
455 Module for Diamond Technologies DT-019X / Avance Logic ALS-007 (PnP
458 port - Port # (PnP setup)
459 mpu_port - Port # for MPU-401 (PnP setup)
460 fm_port - Port # for FM OPL-3 (PnP setup)
461 irq - IRQ # (PnP setup)
462 mpu_irq - IRQ # for MPU-401 (PnP setup)
463 dma8 - DMA # (PnP setup)
465 This module supports multiple cards. This module is enabled only with
468 The power-management is supported.
473 Module for the dummy sound card. This "card" doesn't do any output
474 or input, but you may use this module for any application which
475 requires a sound card (like RealPlayer).
477 The power-management is supported.
482 Module for Echoaudio 3G cards (Gina3G/Layla3G)
484 This module supports multiple cards.
485 The driver requires the firmware loader support on kernel.
490 Module for EMU10K1/EMU10k2 based PCI sound cards.
491 * Sound Blaster Live!
492 * Sound Blaster PCI 512
493 * Emu APS (partially supported)
494 * Sound Blaster Audigy
496 extin - bitmap of available external inputs for FX8010 (see bellow)
497 extout - bitmap of available external outputs for FX8010 (see bellow)
498 seq_ports - allocated sequencer ports (4 by default)
499 max_synth_voices - limit of voices used for wavetable (64 by default)
500 max_buffer_size - specifies the maximum size of wavetable/pcm buffers
501 given in MB unit. Default value is 128.
502 enable_ir - enable IR
504 This module supports multiple cards and autoprobe.
506 Input & Output configurations [extin/extout]
507 * Creative Card wo/Digital out [0x0003/0x1f03]
508 * Creative Card w/Digital out [0x0003/0x1f0f]
509 * Creative Card w/Digital CD in [0x000f/0x1f0f]
510 * Creative Card wo/Digital out + LiveDrive [0x3fc3/0x1fc3]
511 * Creative Card w/Digital out + LiveDrive [0x3fc3/0x1fcf]
512 * Creative Card w/Digital CD in + LiveDrive [0x3fcf/0x1fcf]
513 * Creative Card wo/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
514 * Creative Card w/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
515 * Creative Card w/Digital CD in + Digital I/O 2 [0x0fcf/0x1f0f]
516 * Creative Card 5.1/w Digital out + LiveDrive [0x3fc3/0x1fff]
517 * Creative Card 5.1 (c) 2003 [0x3fc3/0x7cff]
518 * Creative Card all ins and outs [0x3fff/0x7fff]
520 The power-management is supported.
525 Module for Creative Emu10k1X (SB Live Dell OEM version)
527 This module supports multiple cards.
532 Module for Ensoniq AudioPCI ES1370 PCI sound cards.
533 * SoundBlaster PCI 64
534 * SoundBlaster PCI 128
536 joystick - Enable joystick (default off)
538 This module supports multiple cards and autoprobe.
543 Module for Ensoniq AudioPCI ES1371 PCI sound cards.
544 * SoundBlaster PCI 64
545 * SoundBlaster PCI 128
546 * SoundBlaster Vibra PCI
548 joystick_port - port # for joystick (0x200,0x208,0x210,0x218),
549 0 = disable (default), 1 = auto-detect
551 This module supports multiple cards and autoprobe.
556 Module for sound cards based on ESS ES968 chip (PnP only).
558 port - port # for ES968 (SB8) chip (PnP setup)
559 irq - IRQ # for ES968 (SB8) chip (PnP setup)
560 dma1 - DMA # for ES968 (SB8) chip (PnP setup)
562 This module supports multiple cards, PnP and autoprobe.
564 The power-management is supported.
569 Module for ESS AudioDrive ES-1688 and ES-688 sound cards.
571 port - port # for ES-1688 chip (0x220,0x240,0x260)
572 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
573 irq - IRQ # for ES-1688 chip (5,7,9,10)
574 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
575 dma8 - DMA # for ES-1688 chip (0,1,3)
577 This module supports multiple cards and autoprobe (without MPU-401 port).
582 Module for ESS AudioDrive ES-18xx sound cards.
584 port - port # for ES-18xx chip (0x220,0x240,0x260)
585 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
586 fm_port - port # for FM (optional, not used)
587 irq - IRQ # for ES-18xx chip (5,7,9,10)
588 dma1 - first DMA # for ES-18xx chip (0,1,3)
589 dma2 - first DMA # for ES-18xx chip (0,1,3)
590 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
592 This module supports multiple cards, ISA PnP and autoprobe (without MPU-401
593 port if native ISA PnP routines are not used).
594 When dma2 is equal with dma1, the driver works as half-duplex.
596 The power-management is supported.
601 Module for sound cards based on ESS Solo-1 (ES1938,ES1946) chips.
603 This module supports multiple cards and autoprobe.
605 The power-management is supported.
610 Module for sound cards based on ESS Maestro-1/2/2E (ES1968/ES1978) chips.
612 total_bufsize - total buffer size in kB (1-4096kB)
613 pcm_substreams_p - playback channels (1-8, default=2)
614 pcm_substreams_c - capture channels (1-8, default=0)
615 clock - clock (0 = auto-detection)
616 use_pm - support the power-management (0 = off, 1 = on,
618 enable_mpu - enable MPU401 (0 = off, 1 = on, 2 = auto (default))
619 joystick - enable joystick (default off)
621 This module supports multiple cards and autoprobe.
623 The power-management is supported.
628 Module for ForteMedia FM801 based PCI sound cards.
630 tea575x_tuner - Enable TEA575x tuner
631 - 1 = MediaForte 256-PCS
632 - 2 = MediaForte 256-PCPR
633 - 3 = MediaForte 64-PCR
634 - High 16-bits are video (radio) device number + 1
635 - example: 0x10002 (MediaForte 256-PCPR, device 1)
637 This module supports multiple cards and autoprobe.
639 The power-management is supported.
644 Module for Echoaudio Gina20
646 This module supports multiple cards.
647 The driver requires the firmware loader support on kernel.
652 Module for Echoaudio Gina24
654 This module supports multiple cards.
655 The driver requires the firmware loader support on kernel.
657 Module snd-gusclassic
658 ---------------------
660 Module for Gravis UltraSound Classic sound card.
662 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
663 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
664 dma1 - DMA # for GF1 chip (1,3,5,6,7)
665 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
666 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
667 voices - GF1 voices limit (14-32)
668 pcm_voices - reserved PCM voices
670 This module supports multiple cards and autoprobe.
672 Module snd-gusextreme
673 ---------------------
675 Module for Gravis UltraSound Extreme (Synergy ViperMax) sound card.
677 port - port # for ES-1688 chip (0x220,0x230,0x240,0x250,0x260)
678 gf1_port - port # for GF1 chip (0x210,0x220,0x230,0x240,0x250,0x260,0x270)
679 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable
680 irq - IRQ # for ES-1688 chip (5,7,9,10)
681 gf1_irq - IRQ # for GF1 chip (3,5,9,11,12,15)
682 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
683 dma8 - DMA # for ES-1688 chip (0,1,3)
684 dma1 - DMA # for GF1 chip (1,3,5,6,7)
685 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
686 voices - GF1 voices limit (14-32)
687 pcm_voices - reserved PCM voices
689 This module supports multiple cards and autoprobe (without MPU-401 port).
694 Module for Gravis UltraSound MAX sound card.
696 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
697 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
698 dma1 - DMA # for GF1 chip (1,3,5,6,7)
699 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
700 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
701 voices - GF1 voices limit (14-32)
702 pcm_voices - reserved PCM voices
704 This module supports multiple cards and autoprobe.
709 Module for Intel HD Audio (ICH6, ICH6M, ICH7), ATI SB450,
712 model - force the model name
713 position_fix - Fix DMA pointer (0 = auto, 1 = none, 2 = POSBUF, 3 = FIFO size)
715 This module supports one card and autoprobe.
717 Each codec may have a model table for different configurations.
718 If your machine isn't listed there, the default (usually minimal)
719 configuration is set up. You can pass "model=<name>" option to
720 specify a certain model in such a case. There are different
721 models depending on the codec chip.
723 Model name Description
724 ---------- -----------
726 3stack 3-jack in back and a headphone out
727 3stack-digout 3-jack in back, a HP out and a SPDIF out
728 5stack 5-jack in back, 2-jack in front
729 5stack-digout 5-jack in back, 2-jack in front, a SPDIF out
730 6stack 6-jack in back, 2-jack in front
731 6stack-digout 6-jack with a SPDIF out
733 z71v 3-jack (HP shared SPDIF)
737 test for testing/debugging purpose, almost all controls can be
738 adjusted. Appearing only when compiled with
743 fujitsu Fujitsu S7020
746 minimal 3-jack in back
747 min_fp 3-jack in back, 2-jack in front
748 full 6-jack in back, 2-jack in front
749 full_dig 6-jack in back, 2-jack in front, SPDIF I/O
750 allout 5-jack in back, 2-jack in front, SPDIF out
751 auto auto-config reading BIOS (default)
753 If the default configuration doesn't work and one of the above
754 matches with your device, report it together with the PCI
755 subsystem ID (output of "lspci -nv") to ALSA BTS or alsa-devel
756 ML (see the section "Links and Addresses").
758 Note 2: If you get click noises on output, try the module option
759 position_fix=1 or 2. position_fix=1 will use the SD_LPIB
760 register value without FIFO size correction as the current
761 DMA pointer. position_fix=2 will make the driver to use
762 the position buffer instead of reading SD_LPIB register.
763 (Usually SD_LPLIB register is more accurate than the
766 The power-management is supported.
771 Module for RME Hammerfall DSP audio interface(s)
773 This module supports multiple cards.
775 Note: The firmware data can be automatically loaded via hotplug
776 when CONFIG_FW_LOADER is set. Otherwise, you need to load
777 the firmware via hdsploader utility included in alsa-tools
779 The firmware data is found in alsa-firmware package.
781 Note: snd-page-alloc module does the job which snd-hammerfall-mem
782 module did formerly. It will allocate the buffers in advance
783 when any HDSP cards are found. To make the buffer
784 allocation sure, load snd-page-alloc module in the early
785 stage of boot sequence. See "Early Buffer Allocation"
791 Module for RME HDSP MADI board.
793 precise_ptr - Enable precise pointer, or disable.
794 line_outs_monitor - Send playback streams to analog outs by default.
795 enable_monitor - Enable Analog Out on Channel 63/64 by default.
797 See hdspm.txt for details.
802 Module for Envy24 (ICE1712) based PCI sound cards.
803 * MidiMan M Audio Delta 1010
804 * MidiMan M Audio Delta 1010LT
805 * MidiMan M Audio Delta DiO 2496
806 * MidiMan M Audio Delta 66
807 * MidiMan M Audio Delta 44
808 * MidiMan M Audio Delta 410
809 * MidiMan M Audio Audiophile 2496
815 * Hoontech SoundTrack DSP 24
816 * Hoontech SoundTrack DSP 24 Value
817 * Hoontech SoundTrack DSP 24 Media 7.1
818 * Event Electronics, EZ8
820 * Lionstracs, Mediastaton
822 model - Use the given board model, one of the following:
823 delta1010, dio2496, delta66, delta44, audiophile, delta410,
824 delta1010lt, vx442, ewx2496, ews88mt, ews88mt_new, ews88d,
825 dmx6fire, dsp24, dsp24_value, dsp24_71, ez8,
826 phase88, mediastation
827 omni - Omni I/O support for MidiMan M-Audio Delta44/66
828 cs8427_timeout - reset timeout for the CS8427 chip (S/PDIF transciever)
829 in msec resolution, default value is 500 (0.5 sec)
831 This module supports multiple cards and autoprobe. Note: The consumer part
832 is not used with all Envy24 based cards (for example in the MidiMan Delta
835 Note: The supported board is detected by reading EEPROM or PCI
836 SSID (if EEPROM isn't available). You can override the
837 model by passing "model" module option in case that the
838 driver isn't configured properly or you want to try another
844 Module for Envy24HT (VT/ICE1724), Envy24PT (VT1720) based PCI sound cards.
845 * MidiMan M Audio Revolution 7.1
847 * TerraTec Aureon 5.1 Sky
848 * TerraTec Aureon 7.1 Space
849 * TerraTec Aureon 7.1 Universe
852 * AudioTrak Prodigy 7.1
853 * AudioTrak Prodigy 192
855 * Albatron K8X800 Pro II
862 model - Use the given board model, one of the following:
863 revo71, amp2000, prodigy71, prodigy192, aureon51,
864 aureon71, universe, k8x800, phase22, phase28, ms300,
867 This module supports multiple cards and autoprobe.
869 Note: The supported board is detected by reading EEPROM or PCI
870 SSID (if EEPROM isn't available). You can override the
871 model by passing "model" module option in case that the
872 driver isn't configured properly or you want to try another
878 Module for Echoaudio Indigo
880 This module supports multiple cards.
881 The driver requires the firmware loader support on kernel.
886 Module for Echoaudio Indigo DJ
888 This module supports multiple cards.
889 The driver requires the firmware loader support on kernel.
894 Module for Echoaudio Indigo IO
896 This module supports multiple cards.
897 The driver requires the firmware loader support on kernel.
902 Module for AC'97 motherboards from Intel and compatibles.
903 * Intel i810/810E, i815, i820, i830, i84x, MX440
904 ICH5, ICH6, ICH7, ESB2
906 * NVidia NForce, NForce2, NForce3, MCP04, CK804
908 * AMD AMD768, AMD8111
911 ac97_clock - AC'97 codec clock base (0 = auto-detect)
912 ac97_quirk - AC'97 workaround for strange hardware
913 See "AC97 Quirk Option" section below.
914 buggy_irq - Enable workaround for buggy interrupts on some
915 motherboards (default yes on nForce chips,
917 buggy_semaphore - Enable workaround for hardwares with buggy
918 semaphores (e.g. on some ASUS laptops)
921 This module supports one chip and autoprobe.
923 Note: the latest driver supports auto-detection of chip clock.
924 if you still encounter too fast playback, specify the clock
925 explicitly via the module option "ac97_clock=41194".
927 Joystick/MIDI ports are not supported by this driver. If your
928 motherboard has these devices, use the ns558 or snd-mpu401
929 modules, respectively.
931 The power-management is supported.
936 Module for Intel ICH (i8x0) chipset MC97 modems.
937 * Intel i810/810E, i815, i820, i830, i84x, MX440
940 * NVidia NForce, NForce2, NForce2s, NForce3
944 ac97_clock - AC'97 codec clock base (0 = auto-detect)
946 This module supports one card and autoprobe.
948 Note: The default index value of this module is -2, i.e. the first
951 The power-management is supported.
956 Module for Gravis UltraSound PnP, Dynasonic 3-D/Pro, STB Sound Rage 32
957 and other sound cards based on AMD InterWave (tm) chip.
959 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
960 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
961 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
962 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
963 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
964 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
965 pcm_voices - reserved PCM voices for the synthesizer (default 2)
966 effect - 1 = InterWave effects enable (default 0);
969 This module supports multiple cards, autoprobe and ISA PnP.
971 Module snd-interwave-stb
972 ------------------------
974 Module for UltraSound 32-Pro (sound card from STB used by Compaq)
975 and other sound cards based on AMD InterWave (tm) chip with TEA6330T
976 circuit for extended control of bass, treble and master volume.
978 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
979 port_tc - tone control (i2c bus) port # for TEA6330T chip (0x350,0x360,0x370,0x380)
980 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
981 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
982 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
983 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
984 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
985 pcm_voices - reserved PCM voices for the synthesizer (default 2)
986 effect - 1 = InterWave effects enable (default 0);
989 This module supports multiple cards, autoprobe and ISA PnP.
994 Module for Korg 1212 IO PCI card
996 This module supports multiple cards.
1001 Module for Echoaudio Layla20
1003 This module supports multiple cards.
1004 The driver requires the firmware loader support on kernel.
1009 Module for Echoaudio Layla24
1011 This module supports multiple cards.
1012 The driver requires the firmware loader support on kernel.
1017 Module for Allegro/Maestro3 chips
1019 external_amp - enable external amp (enabled by default)
1020 amp_gpio - GPIO pin number for external amp (0-15) or
1021 -1 for default pin (8 for allegro, 1 for
1024 This module supports autoprobe and multiple chips.
1026 Note: the binding of amplifier is dependent on hardware.
1027 If there is no sound even though all channels are unmuted, try to
1028 specify other gpio connection via amp_gpio option.
1029 For example, a Panasonic notebook might need "amp_gpio=0x0d"
1032 The power-management is supported.
1037 Module for Echoaudio Mia
1039 This module supports multiple cards.
1040 The driver requires the firmware loader support on kernel.
1045 Module for Digigram miXart8 sound cards.
1047 This module supports multiple cards.
1048 Note: One miXart8 board will be represented as 4 alsa cards.
1049 See MIXART.txt for details.
1051 When the driver is compiled as a module and the hotplug firmware
1052 is supported, the firmware data is loaded via hotplug automatically.
1053 Install the necessary firmware files in alsa-firmware package.
1054 When no hotplug fw loader is available, you need to load the
1055 firmware via mixartloader utility in alsa-tools package.
1060 Module for Echoaudio Mona
1062 This module supports multiple cards.
1063 The driver requires the firmware loader support on kernel.
1068 Module for MPU-401 UART devices.
1070 port - port number or -1 (disable)
1071 irq - IRQ number or -1 (disable)
1072 pnp - PnP detection - 0 = disable, 1 = enable (default)
1074 This module supports multiple devices and PnP.
1079 Module for MOTU MidiTimePiece AV multiport MIDI (on the parallel
1082 port - I/O port # for MTPAV (0x378,0x278, default=0x378)
1083 irq - IRQ # for MTPAV (7,5, default=7)
1084 hwports - number of supported hardware ports, default=8.
1086 Module supports only 1 card. This module has no enable option.
1091 Module for NeoMagic NM256AV/ZX chips
1093 playback_bufsize - max playback frame size in kB (4-128kB)
1094 capture_bufsize - max capture frame size in kB (4-128kB)
1095 force_ac97 - 0 or 1 (disabled by default)
1096 buffer_top - specify buffer top address
1097 use_cache - 0 or 1 (disabled by default)
1098 vaio_hack - alias buffer_top=0x25a800
1099 reset_workaround - enable AC97 RESET workaround for some laptops
1100 reset_workaround2 - enable extended AC97 RESET workaround for some
1103 This module supports one chip and autoprobe.
1105 The power-management is supported.
1107 Note: on some notebooks the buffer address cannot be detected
1108 automatically, or causes hang-up during initialization.
1109 In such a case, specify the buffer top address explicity via
1112 Sony F250: buffer_top=0x25a800
1113 Sony F270: buffer_top=0x272800
1114 The driver supports only ac97 codec. It's possible to force
1115 to initialize/use ac97 although it's not detected. In such a
1116 case, use force_ac97=1 option - but *NO* guarantee whether it
1119 Note: The NM256 chip can be linked internally with non-AC97
1120 codecs. This driver supports only the AC97 codec, and won't work
1121 with machines with other (most likely CS423x or OPL3SAx) chips,
1122 even though the device is detected in lspci. In such a case, try
1123 other drivers, e.g. snd-cs4232 or snd-opl3sa2. Some has ISA-PnP
1124 but some doesn't have ISA PnP. You'll need to specify isapnp=0
1125 and proper hardware parameters in the case without ISA PnP.
1127 Note: some laptops need a workaround for AC97 RESET. For the
1128 known hardware like Dell Latitude LS and Sony PCG-F305, this
1129 workaround is enabled automatically. For other laptops with a
1130 hard freeze, you can try reset_workaround=1 option.
1132 Note: Dell Latitude CSx laptops have another problem regarding
1133 AC97 RESET. On these laptops, reset_workaround2 option is
1134 turned on as default. This option is worth to try if the
1135 previous reset_workaround option doesn't help.
1137 Note: This driver is really crappy. It's a porting from the
1138 OSS driver, which is a result of black-magic reverse engineering.
1139 The detection of codec will fail if the driver is loaded *after*
1140 X-server as described above. You might be able to force to load
1141 the module, but it may result in hang-up. Hence, make sure that
1142 you load this module *before* X if you encounter this kind of
1148 Module for Yamaha OPL3-SA2/SA3 sound cards.
1150 port - control port # for OPL3-SA chip (0x370)
1151 sb_port - SB port # for OPL3-SA chip (0x220,0x240)
1152 wss_port - WSS port # for OPL3-SA chip (0x530,0xe80,0xf40,0x604)
1153 midi_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1154 fm_port - FM port # for OPL3-SA chip (0x388), -1 = disable
1155 irq - IRQ # for OPL3-SA chip (5,7,9,10)
1156 dma1 - first DMA # for Yamaha OPL3-SA chip (0,1,3)
1157 dma2 - second DMA # for Yamaha OPL3-SA chip (0,1,3), -1 = disable
1158 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1160 This module supports multiple cards and ISA PnP. It does not support
1161 autoprobe (if ISA PnP is not used) thus all ports must be specified!!!
1163 The power-management is supported.
1165 Module snd-opti92x-ad1848
1166 -------------------------
1168 Module for sound cards based on OPTi 82c92x and Analog Devices AD1848 chips.
1169 Module works with OAK Mozart cards as well.
1171 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1172 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1173 fm_port - port # for OPL3 device (0x388)
1174 irq - IRQ # for WSS chip (5,7,9,10,11)
1175 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1176 dma1 - first DMA # for WSS chip (0,1,3)
1178 This module supports only one card, autoprobe and PnP.
1180 Module snd-opti92x-cs4231
1181 -------------------------
1183 Module for sound cards based on OPTi 82c92x and Crystal CS4231 chips.
1185 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1186 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1187 fm_port - port # for OPL3 device (0x388)
1188 irq - IRQ # for WSS chip (5,7,9,10,11)
1189 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1190 dma1 - first DMA # for WSS chip (0,1,3)
1191 dma2 - second DMA # for WSS chip (0,1,3)
1193 This module supports only one card, autoprobe and PnP.
1198 Module for sound cards based on OPTi 82c93x chips.
1200 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1201 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1202 fm_port - port # for OPL3 device (0x388)
1203 irq - IRQ # for WSS chip (5,7,9,10,11)
1204 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1205 dma1 - first DMA # for WSS chip (0,1,3)
1206 dma2 - second DMA # for WSS chip (0,1,3)
1208 This module supports only one card, autoprobe and PnP.
1213 Module for Digigram PCXHR boards
1215 This module supports multiple cards.
1217 Module snd-powermac (on ppc only)
1218 ---------------------------------
1220 Module for PowerMac, iMac and iBook on-board soundchips
1222 enable_beep - enable beep using PCM (enabled as default)
1224 Module supports autoprobe a chip.
1226 Note: the driver may have problems regarding endianess.
1228 The power-management is supported.
1230 Module snd-pxa2xx-ac97 (on arm only)
1231 ------------------------------------
1233 Module for AC97 driver for the Intel PXA2xx chip
1235 For ARM architecture only.
1237 The power-management is supported.
1242 Module for RME Digi32, Digi32 Pro and Digi32/8 (Sek'd Prodif32,
1243 Prodif96 and Prodif Gold) sound cards.
1245 This module supports multiple cards.
1250 Module for RME Digi96, Digi96/8 and Digi96/8 PRO/PAD/PST sound cards.
1252 This module supports multiple cards.
1257 Module for RME Digi9652 (Hammerfall, Hammerfall-Light) sound cards.
1259 precise_ptr - Enable precise pointer (doesn't work reliably).
1262 This module supports multiple cards.
1264 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1265 module did formerly. It will allocate the buffers in advance
1266 when any RME9652 cards are found. To make the buffer
1267 allocation sure, load snd-page-alloc module in the early
1268 stage of boot sequence. See "Early Buffer Allocation"
1271 Module snd-sa11xx-uda1341 (on arm only)
1272 ---------------------------------------
1274 Module for Philips UDA1341TS on Compaq iPAQ H3600 sound card.
1276 Module supports only one card.
1277 Module has no enable and index options.
1279 The power-management is supported.
1284 Module for 8-bit SoundBlaster cards: SoundBlaster 1.0,
1288 port - port # for SB DSP chip (0x220,0x240,0x260)
1289 irq - IRQ # for SB DSP chip (5,7,9,10)
1290 dma8 - DMA # for SB DSP chip (1,3)
1292 This module supports multiple cards and autoprobe.
1294 The power-management is supported.
1296 Module snd-sb16 and snd-sbawe
1297 -----------------------------
1299 Module for 16-bit SoundBlaster cards: SoundBlaster 16 (PnP),
1300 SoundBlaster AWE 32 (PnP),
1301 SoundBlaster AWE 64 PnP
1303 port - port # for SB DSP 4.x chip (0x220,0x240,0x260)
1304 mpu_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1305 awe_port - base port # for EMU8000 synthesizer (0x620,0x640,0x660)
1306 (snd-sbawe module only)
1307 irq - IRQ # for SB DSP 4.x chip (5,7,9,10)
1308 dma8 - 8-bit DMA # for SB DSP 4.x chip (0,1,3)
1309 dma16 - 16-bit DMA # for SB DSP 4.x chip (5,6,7)
1310 mic_agc - Mic Auto-Gain-Control - 0 = disable, 1 = enable (default)
1311 csp - ASP/CSP chip support - 0 = disable (default), 1 = enable
1312 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1314 This module supports multiple cards, autoprobe and ISA PnP.
1316 Note: To use Vibra16X cards in 16-bit half duplex mode, you must
1317 disable 16bit DMA with dma16 = -1 module parameter.
1318 Also, all Sound Blaster 16 type cards can operate in 16-bit
1319 half duplex mode through 8-bit DMA channel by disabling their
1322 The power-management is supported.
1327 Module for Aztech Sound Galaxy sound card.
1329 sbport - Port # for SB16 interface (0x220,0x240)
1330 wssport - Port # for WSS interface (0x530,0xe80,0xf40,0x604)
1331 irq - IRQ # (7,9,10,11)
1334 This module supports multiple cards.
1336 The power-management is supported.
1341 Module for ENSONIQ SoundScape PnP cards.
1343 port - Port # (PnP setup)
1344 irq - IRQ # (PnP setup)
1345 mpu_irq - MPU-401 IRQ # (PnP setup)
1346 dma - DMA # (PnP setup)
1348 This module supports multiple cards. ISA PnP must be enabled.
1349 You need sscape_ctl tool in alsa-tools package for loading
1352 Module snd-sun-amd7930 (on sparc only)
1353 --------------------------------------
1355 Module for AMD7930 sound chips found on Sparcs.
1357 This module supports multiple cards.
1359 Module snd-sun-cs4231 (on sparc only)
1360 -------------------------------------
1362 Module for CS4231 sound chips found on Sparcs.
1364 This module supports multiple cards.
1366 Module snd-sun-dbri (on sparc only)
1367 -----------------------------------
1369 Module for DBRI sound chips found on Sparcs.
1371 This module supports multiple cards.
1373 Module snd-wavefront
1374 --------------------
1376 Module for Turtle Beach Maui, Tropez and Tropez+ sound cards.
1378 cs4232_pcm_port - Port # for CS4232 PCM interface.
1379 cs4232_pcm_irq - IRQ # for CS4232 PCM interface (5,7,9,11,12,15).
1380 cs4232_mpu_port - Port # for CS4232 MPU-401 interface.
1381 cs4232_mpu_irq - IRQ # for CS4232 MPU-401 interface (9,11,12,15).
1382 use_cs4232_midi - Use CS4232 MPU-401 interface
1383 (inaccessibly located inside your computer)
1384 ics2115_port - Port # for ICS2115
1385 ics2115_irq - IRQ # for ICS2115
1386 fm_port - FM OPL-3 Port #
1387 dma1 - DMA1 # for CS4232 PCM interface.
1388 dma2 - DMA2 # for CS4232 PCM interface.
1389 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1391 This module supports multiple cards and ISA PnP.
1393 Module snd-sonicvibes
1394 ---------------------
1396 Module for S3 SonicVibes PCI sound cards.
1397 * PINE Schubert 32 PCI
1399 reverb - Reverb Enable - 1 = enable, 0 = disable (default)
1400 - SoundCard must have onboard SRAM for this.
1401 mge - Mic Gain Enable - 1 = enable, 0 = disable (default)
1403 This module supports multiple cards and autoprobe.
1405 Module snd-serial-u16550
1406 ------------------------
1408 Module for UART16550A serial MIDI ports.
1410 port - port # for UART16550A chip
1411 irq - IRQ # for UART16550A chip, -1 = poll mode
1412 speed - speed in bauds (9600,19200,38400,57600,115200)
1414 base - base for divisor in bauds (57600,115200,230400,460800)
1416 outs - number of MIDI ports in a serial port (1-4)
1418 adaptor - Type of adaptor.
1419 0 = Soundcanvas, 1 = MS-124T, 2 = MS-124W S/A,
1420 3 = MS-124W M/B, 4 = Generic
1422 This module supports multiple cards. This module does not support autoprobe
1423 thus the main port must be specified!!! Other options are optional.
1428 Module for Trident 4DWave DX/NX sound cards.
1429 * Best Union Miss Melody 4DWave PCI
1431 * Warpspeed ONSpeed 4DWave PCI
1434 * CHIC True Sound 4Dwave
1435 * Shark Predator4D-PCI
1436 * Jaton SonicWave 4D
1438 pcm_channels - max channels (voices) reserved for PCM
1439 wavetable_size - max wavetable size in kB (4-?kb)
1441 This module supports multiple cards and autoprobe.
1443 The power-management is supported.
1445 Module snd-usb-audio
1446 --------------------
1448 Module for USB audio and USB MIDI devices.
1450 vid - Vendor ID for the device (optional)
1451 pid - Product ID for the device (optional)
1453 This module supports multiple devices, autoprobe and hotplugging.
1455 Module snd-usb-usx2y
1456 --------------------
1458 Module for Tascam USB US-122, US-224 and US-428 devices.
1460 This module supports multiple devices, autoprobe and hotplugging.
1462 Note: you need to load the firmware via usx2yloader utility included
1463 in alsa-tools and alsa-firmware packages.
1468 Module for AC'97 motherboards based on VIA 82C686A/686B, 8233,
1469 8233A, 8233C, 8235, 8237 (south) bridge.
1471 mpu_port - 0x300,0x310,0x320,0x330, otherwise obtain BIOS setup
1473 joystick - Enable joystick (default off) [VIA686A/686B only]
1474 ac97_clock - AC'97 codec clock base (default 48000Hz)
1475 dxs_support - support DXS channels,
1476 0 = auto (default), 1 = enable, 2 = disable,
1477 3 = 48k only, 4 = no VRA, 5 = enable any sample
1478 rate and different sample rates on different
1480 [VIA8233/C, 8235, 8237 only]
1481 ac97_quirk - AC'97 workaround for strange hardware
1482 See "AC97 Quirk Option" section below.
1484 This module supports one chip and autoprobe.
1486 Note: on some SMP motherboards like MSI 694D the interrupts might
1487 not be generated properly. In such a case, please try to
1488 set the SMP (or MPS) version on BIOS to 1.1 instead of
1489 default value 1.4. Then the interrupt number will be
1490 assigned under 15. You might also upgrade your BIOS.
1492 Note: VIA8233/5/7 (not VIA8233A) can support DXS (direct sound)
1493 channels as the first PCM. On these channels, up to 4
1494 streams can be played at the same time, and the controller
1495 can perform sample rate conversion with separate rates for
1497 As default (dxs_support = 0), 48k fixed rate is chosen
1498 except for the known devices since the output is often
1499 noisy except for 48k on some mother boards due to the
1501 Please try once dxs_support=5 and if it works on other
1502 sample rates (e.g. 44.1kHz of mp3 playback), please let us
1503 know the PCI subsystem vendor/device id's (output of
1505 If dxs_support=5 does not work, try dxs_support=4; if it
1506 doesn't work too, try dxs_support=1. (dxs_support=1 is
1507 usually for old motherboards. The correct implemented
1508 board should work with 4 or 5.) If it still doesn't
1509 work and the default setting is ok, dxs_support=3 is the
1510 right choice. If the default setting doesn't work at all,
1511 try dxs_support=2 to disable the DXS channels.
1512 In any cases, please let us know the result and the
1513 subsystem vendor/device ids. See "Links and Addresses"
1516 Note: for the MPU401 on VIA823x, use snd-mpu401 driver
1517 additionally. The mpu_port option is for VIA686 chips only.
1519 The power-management is supported.
1521 Module snd-via82xx-modem
1522 ------------------------
1524 Module for VIA82xx AC97 modem
1526 ac97_clock - AC'97 codec clock base (default 48000Hz)
1528 This module supports one card and autoprobe.
1530 Note: The default index value of this module is -2, i.e. the first
1533 The power-management is supported.
1538 Module for virtual rawmidi devices.
1539 This module creates virtual rawmidi devices which communicate
1540 to the corresponding ALSA sequencer ports.
1542 midi_devs - MIDI devices # (1-4, default=4)
1544 This module supports multiple cards.
1549 Module for Digigram VX-Pocket VX222, V222 v2 and Mic cards.
1551 mic - Enable Microphone on V222 Mic (NYI)
1552 ibl - Capture IBL size. (default = 0, minimum size)
1554 This module supports multiple cards.
1556 When the driver is compiled as a module and the hotplug firmware
1557 is supported, the firmware data is loaded via hotplug automatically.
1558 Install the necessary firmware files in alsa-firmware package.
1559 When no hotplug fw loader is available, you need to load the
1560 firmware via vxloader utility in alsa-tools package. To invoke
1561 vxloader automatically, add the following to /etc/modprobe.conf
1563 install snd-vx222 /sbin/modprobe --first-time -i snd-vx222 && /usr/bin/vxloader
1565 (for 2.2/2.4 kernels, add "post-install /usr/bin/vxloader" to
1566 /etc/modules.conf, instead.)
1567 IBL size defines the interrupts period for PCM. The smaller size
1568 gives smaller latency but leads to more CPU consumption, too.
1569 The size is usually aligned to 126. As default (=0), the smallest
1570 size is chosen. The possible IBL values can be found in
1571 /proc/asound/cardX/vx-status proc file.
1573 The power-management is supported.
1578 Module for Digigram VX-Pocket VX2 and 440 PCMCIA cards.
1580 ibl - Capture IBL size. (default = 0, minimum size)
1582 This module supports multiple cards. The module is compiled only when
1583 PCMCIA is supported on kernel.
1585 With the older 2.6.x kernel, to activate the driver via the card
1586 manager, you'll need to set up /etc/pcmcia/vxpocket.conf. See the
1587 sound/pcmcia/vx/vxpocket.c. 2.6.13 or later kernel requires no
1588 longer require a config file.
1590 When the driver is compiled as a module and the hotplug firmware
1591 is supported, the firmware data is loaded via hotplug automatically.
1592 Install the necessary firmware files in alsa-firmware package.
1593 When no hotplug fw loader is available, you need to load the
1594 firmware via vxloader utility in alsa-tools package.
1596 About capture IBL, see the description of snd-vx222 module.
1598 Note: the driver is build only when CONFIG_ISA is set.
1600 Note2: snd-vxp440 driver is merged to snd-vxpocket driver since
1603 The power-management is supported.
1608 Module for Yamaha PCI chips (YMF72x, YMF74x & YMF75x).
1610 mpu_port - 0x300,0x330,0x332,0x334, 0 (disable) by default,
1611 1 (auto-detect for YMF744/754 only)
1612 fm_port - 0x388,0x398,0x3a0,0x3a8, 0 (disable) by default
1613 1 (auto-detect for YMF744/754 only)
1614 joystick_port - 0x201,0x202,0x204,0x205, 0 (disable) by default,
1616 rear_switch - enable shared rear/line-in switch (bool)
1618 This module supports autoprobe and multiple chips.
1620 The power-management is supported.
1622 Module snd-pdaudiocf
1623 --------------------
1625 Module for Sound Core PDAudioCF sound card.
1627 Note: the driver is build only when CONFIG_ISA is set.
1629 The power-management is supported.
1635 The ac97_quirk option is used to enable/override the workaround for
1636 specific devices on drivers for on-board AC'97 controllers like
1637 snd-intel8x0. Some hardware have swapped output pins between Master
1638 and Headphone, or Surround (thanks to confusion of AC'97
1639 specifications from version to version :-)
1641 The driver provides the auto-detection of known problematic devices,
1642 but some might be unknown or wrongly detected. In such a case, pass
1643 the proper value with this option.
1645 The following strings are accepted:
1646 - default Don't override the default setting
1647 - none Disable the quirk
1648 - hp_only Bind Master and Headphone controls as a single control
1649 - swap_hp Swap headphone and master controls
1650 - swap_surround Swap master and surround controls
1651 - ad_sharing For AD1985, turn on OMS bit and use headphone
1652 - alc_jack For ALC65x, turn on the jack sense mode
1653 - inv_eapd Inverted EAPD implementation
1654 - mute_led Bind EAPD bit for turning on/off mute LED
1656 For backward compatibility, the corresponding integer value -1, 0,
1657 ... are accepted, too.
1659 For example, if "Master" volume control has no effect on your device
1660 but only "Headphone" does, pass ac97_quirk=hp_only module option.
1663 Configuring Non-ISAPNP Cards
1664 ============================
1666 When the kernel is configured with ISA-PnP support, the modules
1667 supporting the isapnp cards will have module options "isapnp".
1668 If this option is set, *only* the ISA-PnP devices will be probed.
1669 For probing the non ISA-PnP cards, you have to pass "isapnp=0" option
1670 together with the proper i/o and irq configuration.
1672 When the kernel is configured without ISA-PnP support, isapnp option
1673 will be not built in.
1676 Module Autoloading Support
1677 ==========================
1679 The ALSA drivers can be loaded automatically on demand by defining
1680 module aliases. The string 'snd-card-%1' is requested for ALSA native
1681 devices where %i is sound card number from zero to seven.
1683 To auto-load an ALSA driver for OSS services, define the string
1684 'sound-slot-%i' where %i means the slot number for OSS, which
1685 corresponds to the card index of ALSA. Usually, define this
1686 as the same card module.
1688 An example configuration for a single emu10k1 card is like below:
1689 ----- /etc/modprobe.conf
1690 alias snd-card-0 snd-emu10k1
1691 alias sound-slot-0 snd-emu10k1
1692 ----- /etc/modprobe.conf
1694 The available number of auto-loaded sound cards depends on the module
1695 option "cards_limit" of snd module. As default it's set to 1.
1696 To enable the auto-loading of multiple cards, specify the number of
1697 sound cards in that option.
1699 When multiple cards are available, it'd better to specify the index
1700 number for each card via module option, too, so that the order of
1701 cards is kept consistent.
1703 An example configuration for two sound cards is like below:
1705 ----- /etc/modprobe.conf
1707 options snd cards_limit=2
1708 alias snd-card-0 snd-interwave
1709 alias snd-card-1 snd-ens1371
1710 options snd-interwave index=0
1711 options snd-ens1371 index=1
1713 alias sound-slot-0 snd-interwave
1714 alias sound-slot-1 snd-ens1371
1715 ----- /etc/moprobe.conf
1717 In this example, the interwave card is always loaded as the first card
1718 (index 0) and ens1371 as the second (index 1).
1721 ALSA PCM devices to OSS devices mapping
1722 =======================================
1724 /dev/snd/pcmC0D0[c|p] -> /dev/audio0 (/dev/audio) -> minor 4
1725 /dev/snd/pcmC0D0[c|p] -> /dev/dsp0 (/dev/dsp) -> minor 3
1726 /dev/snd/pcmC0D1[c|p] -> /dev/adsp0 (/dev/adsp) -> minor 12
1727 /dev/snd/pcmC1D0[c|p] -> /dev/audio1 -> minor 4+16 = 20
1728 /dev/snd/pcmC1D0[c|p] -> /dev/dsp1 -> minor 3+16 = 19
1729 /dev/snd/pcmC1D1[c|p] -> /dev/adsp1 -> minor 12+16 = 28
1730 /dev/snd/pcmC2D0[c|p] -> /dev/audio2 -> minor 4+32 = 36
1731 /dev/snd/pcmC2D0[c|p] -> /dev/dsp2 -> minor 3+32 = 39
1732 /dev/snd/pcmC2D1[c|p] -> /dev/adsp2 -> minor 12+32 = 44
1734 The first number from /dev/snd/pcmC{X}D{Y}[c|p] expression means
1735 sound card number and second means device number. The ALSA devices
1736 have either 'c' or 'p' suffix indicating the direction, capture and
1737 playback, respectively.
1739 Please note that the device mapping above may be varied via the module
1740 options of snd-pcm-oss module.
1746 The ALSA driver fully supports the devfs extension.
1747 You should add lines below to your devfsd.conf file:
1749 LOOKUP snd MODLOAD ACTION snd
1750 REGISTER ^sound/.* PERMISSIONS root.audio 660
1751 REGISTER ^snd/.* PERMISSIONS root.audio 660
1753 Warning: These lines assume that you have the audio group in your system.
1754 Otherwise replace audio word with another group name (root for
1758 Proc interfaces (/proc/asound)
1759 ==============================
1761 /proc/asound/card#/pcm#[cp]/oss
1762 -------------------------------
1763 String "erase" - erase all additional informations about OSS applications
1764 String "<app_name> <fragments> <fragment_size> [<options>]"
1766 <app_name> - name of application with (higher priority) or without path
1767 <fragments> - number of fragments or zero if auto
1768 <fragment_size> - size of fragment in bytes or zero if auto
1769 <options> - optional parameters
1770 - disable the application tries to open a pcm device for
1771 this channel but does not want to use it.
1772 (Cause a bug or mmap needs)
1773 It's good for Quake etc...
1774 - direct don't use plugins
1775 - block force block mode (rvplayer)
1776 - non-block force non-block mode
1777 - whole-frag write only whole fragments (optimization affecting
1779 - no-silence do not fill silence ahead to avoid clicks
1780 - buggy-ptr Returns the whitespace blocks in GETOPTR ioctl
1781 instead of filled blocks
1783 Example: echo "x11amp 128 16384" > /proc/asound/card0/pcm0p/oss
1784 echo "squake 0 0 disable" > /proc/asound/card0/pcm0c/oss
1785 echo "rvplayer 0 0 block" > /proc/asound/card0/pcm0p/oss
1788 Early Buffer Allocation
1789 =======================
1791 Some drivers (e.g. hdsp) require the large contiguous buffers, and
1792 sometimes it's too late to find such spaces when the driver module is
1793 actually loaded due to memory fragmentation. You can pre-allocate the
1794 PCM buffers by loading snd-page-alloc module and write commands to its
1795 proc file in prior, for example, in the early boot stage like
1796 /etc/init.d/*.local scripts.
1798 Reading the proc file /proc/drivers/snd-page-alloc shows the current
1799 usage of page allocation. In writing, you can send the following
1800 commands to the snd-page-alloc driver:
1802 - add VENDOR DEVICE MASK SIZE BUFFERS
1804 VENDOR and DEVICE are PCI vendor and device IDs. They take
1805 integer numbers (0x prefix is needed for the hex).
1806 MASK is the PCI DMA mask. Pass 0 if not restricted.
1807 SIZE is the size of each buffer to allocate. You can pass
1808 k and m suffix for KB and MB. The max number is 16MB.
1809 BUFFERS is the number of buffers to allocate. It must be greater
1810 than 0. The max number is 4.
1814 This will erase the all pre-allocated buffers which are not in
1821 ALSA project homepage
1822 http://www.alsa-project.org
1824 ALSA Bug Tracking System
1825 https://bugtrack.alsa-project.org/bugs/
1828 mailto:alsa-devel@lists.sourceforge.net