11da177e4SLinus Torvalds# ALSA soundcard-configuration 21da177e4SLinus Torvaldsconfig SND_TIMER 31da177e4SLinus Torvalds tristate 41da177e4SLinus Torvalds 51da177e4SLinus Torvaldsconfig SND_PCM 61da177e4SLinus Torvalds tristate 71da177e4SLinus Torvalds select SND_TIMER 8a9605391SFlorian Fainelli select GCD 91da177e4SLinus Torvalds 101da177e4SLinus Torvaldsconfig SND_HWDEP 111da177e4SLinus Torvalds tristate 121da177e4SLinus Torvalds 131da177e4SLinus Torvaldsconfig SND_RAWMIDI 141da177e4SLinus Torvalds tristate 151da177e4SLinus Torvalds 160d94e41aSMark Brown# To be effective this also requires INPUT - users should say: 170d94e41aSMark Brown# select SND_JACK if INPUT=y || INPUT=SND 180d94e41aSMark Brown# to avoid having to force INPUT on. 190d94e41aSMark Brownconfig SND_JACK 200d94e41aSMark Brown bool 210d94e41aSMark Brown 221da177e4SLinus Torvaldsconfig SND_SEQUENCER 231da177e4SLinus Torvalds tristate "Sequencer support" 241da177e4SLinus Torvalds select SND_TIMER 251da177e4SLinus Torvalds help 261da177e4SLinus Torvalds Say Y or M to enable MIDI sequencer and router support. This 271da177e4SLinus Torvalds feature allows routing and enqueueing of MIDI events. Events 281da177e4SLinus Torvalds can be processed at a given time. 291da177e4SLinus Torvalds 301da177e4SLinus Torvalds Many programs require this feature, so you should enable it 311da177e4SLinus Torvalds unless you know what you're doing. 321da177e4SLinus Torvalds 331da177e4SLinus Torvaldsconfig SND_SEQ_DUMMY 341da177e4SLinus Torvalds tristate "Sequencer dummy client" 351da177e4SLinus Torvalds depends on SND_SEQUENCER 361da177e4SLinus Torvalds help 371da177e4SLinus Torvalds Say Y here to enable the dummy sequencer client. This client 381da177e4SLinus Torvalds is a simple MIDI-through client: all normal input events are 391da177e4SLinus Torvalds redirected to the output port immediately. 401da177e4SLinus Torvalds 411da177e4SLinus Torvalds You don't need this unless you want to connect many MIDI 421da177e4SLinus Torvalds devices or applications together. 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds To compile this driver as a module, choose M here: the module 451da177e4SLinus Torvalds will be called snd-seq-dummy. 461da177e4SLinus Torvalds 471da177e4SLinus Torvaldsconfig SND_OSSEMUL 48d886e87cSTejun Heo select SOUND_OSS_CORE 491da177e4SLinus Torvalds bool 501da177e4SLinus Torvalds 511da177e4SLinus Torvaldsconfig SND_MIXER_OSS 521da177e4SLinus Torvalds tristate "OSS Mixer API" 531da177e4SLinus Torvalds select SND_OSSEMUL 541da177e4SLinus Torvalds help 551da177e4SLinus Torvalds To enable OSS mixer API emulation (/dev/mixer*), say Y here 561da177e4SLinus Torvalds and read <file:Documentation/sound/alsa/OSS-Emulation.txt>. 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds Many programs still use the OSS API, so say Y. 591da177e4SLinus Torvalds 601da177e4SLinus Torvalds To compile this driver as a module, choose M here: the module 611da177e4SLinus Torvalds will be called snd-mixer-oss. 621da177e4SLinus Torvalds 631da177e4SLinus Torvaldsconfig SND_PCM_OSS 641da177e4SLinus Torvalds tristate "OSS PCM (digital audio) API" 651da177e4SLinus Torvalds select SND_OSSEMUL 661da177e4SLinus Torvalds select SND_PCM 671da177e4SLinus Torvalds help 681da177e4SLinus Torvalds To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y 691da177e4SLinus Torvalds here and read <file:Documentation/sound/alsa/OSS-Emulation.txt>. 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds Many programs still use the OSS API, so say Y. 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds To compile this driver as a module, choose M here: the module 741da177e4SLinus Torvalds will be called snd-pcm-oss. 751da177e4SLinus Torvalds 7621a3479aSJaroslav Kyselaconfig SND_PCM_OSS_PLUGINS 7721a3479aSJaroslav Kysela bool "OSS PCM (digital audio) API - Include plugin system" 7821a3479aSJaroslav Kysela depends on SND_PCM_OSS 7921a3479aSJaroslav Kysela default y 8021a3479aSJaroslav Kysela help 8121a3479aSJaroslav Kysela If you disable this option, the ALSA's OSS PCM API will not 8221a3479aSJaroslav Kysela support conversion of channels, formats and rates. It will 8321a3479aSJaroslav Kysela behave like most of new OSS/Free drivers in 2.4/2.6 kernels. 8421a3479aSJaroslav Kysela 851da177e4SLinus Torvaldsconfig SND_SEQUENCER_OSS 861da177e4SLinus Torvalds bool "OSS Sequencer API" 8789fe5117STakashi Iwai depends on SND_SEQUENCER 881da177e4SLinus Torvalds select SND_OSSEMUL 891da177e4SLinus Torvalds help 901da177e4SLinus Torvalds Say Y here to enable OSS sequencer emulation (both 911da177e4SLinus Torvalds /dev/sequencer and /dev/music interfaces). 921da177e4SLinus Torvalds 931da177e4SLinus Torvalds Many programs still use the OSS API, so say Y. 941da177e4SLinus Torvalds 95c2f60c52SFrederik Deweerdt If you choose M in "Sequencer support" (SND_SEQUENCER), 96c2f60c52SFrederik Deweerdt this will be compiled as a module. The module will be called 97c2f60c52SFrederik Deweerdt snd-seq-oss. 981da177e4SLinus Torvalds 99bbaf5e97STakashi Iwaiconfig SND_HRTIMER 100bbaf5e97STakashi Iwai tristate "HR-timer backend support" 101bbaf5e97STakashi Iwai depends on HIGH_RES_TIMERS 102bbaf5e97STakashi Iwai select SND_TIMER 103bbaf5e97STakashi Iwai help 104bbaf5e97STakashi Iwai Say Y here to enable HR-timer backend for ALSA timer. ALSA uses 105bbaf5e97STakashi Iwai the hrtimer as a precise timing source. The ALSA sequencer code 106bbaf5e97STakashi Iwai also can use this timing source. 107bbaf5e97STakashi Iwai 108bbaf5e97STakashi Iwai To compile this driver as a module, choose M here: the module 109bbaf5e97STakashi Iwai will be called snd-hrtimer. 110bbaf5e97STakashi Iwai 111bbaf5e97STakashi Iwaiconfig SND_SEQ_HRTIMER_DEFAULT 112bbaf5e97STakashi Iwai bool "Use HR-timer as default sequencer timer" 113bbaf5e97STakashi Iwai depends on SND_HRTIMER && SND_SEQUENCER 114bbaf5e97STakashi Iwai default y 115bbaf5e97STakashi Iwai help 116bbaf5e97STakashi Iwai Say Y here to use the HR-timer backend as the default sequencer 117bbaf5e97STakashi Iwai timer. 118bbaf5e97STakashi Iwai 1191da177e4SLinus Torvaldsconfig SND_RTCTIMER 1201da177e4SLinus Torvalds tristate "RTC Timer support" 12189fe5117STakashi Iwai depends on RTC 1221da177e4SLinus Torvalds select SND_TIMER 1231da177e4SLinus Torvalds help 1241da177e4SLinus Torvalds Say Y here to enable RTC timer support for ALSA. ALSA uses 1251da177e4SLinus Torvalds the RTC timer as a precise timing source and maps the RTC 1261da177e4SLinus Torvalds timer to ALSA's timer interface. The ALSA sequencer code also 1271da177e4SLinus Torvalds can use this timing source. 1281da177e4SLinus Torvalds 1291da177e4SLinus Torvalds To compile this driver as a module, choose M here: the module 1301da177e4SLinus Torvalds will be called snd-rtctimer. 1311da177e4SLinus Torvalds 13252948b3fSTakashi Iwai Note that this option is exclusive with the new RTC drivers 13352948b3fSTakashi Iwai (CONFIG_RTC_CLASS) since this requires the old API. 13452948b3fSTakashi Iwai 135a4f508b2SClemens Ladischconfig SND_SEQ_RTCTIMER_DEFAULT 136a4f508b2SClemens Ladisch bool "Use RTC as default sequencer timer" 137a4f508b2SClemens Ladisch depends on SND_RTCTIMER && SND_SEQUENCER 138e78a37bcSTakashi Iwai depends on !SND_SEQ_HRTIMER_DEFAULT 139a4f508b2SClemens Ladisch default y 140a4f508b2SClemens Ladisch help 141a4f508b2SClemens Ladisch Say Y here to use the RTC timer as the default sequencer 142a4f508b2SClemens Ladisch timer. This is strongly recommended because it ensures 143a4f508b2SClemens Ladisch precise MIDI timing even when the system timer runs at less 144a4f508b2SClemens Ladisch than 1000 Hz. 145a4f508b2SClemens Ladisch 146a4f508b2SClemens Ladisch If in doubt, say Y. 147a4f508b2SClemens Ladisch 148332682b1SClemens Ladischconfig SND_DYNAMIC_MINORS 149b10e5391SClemens Ladisch bool "Dynamic device file minor numbers" 150332682b1SClemens Ladisch help 151332682b1SClemens Ladisch If you say Y here, the minor numbers of ALSA device files in 152332682b1SClemens Ladisch /dev/snd/ are allocated dynamically. This allows you to have 153332682b1SClemens Ladisch more than 8 sound cards, but requires a dynamic device file 154332682b1SClemens Ladisch system like udev. 155332682b1SClemens Ladisch 156332682b1SClemens Ladisch If you are unsure about this, say N here. 157332682b1SClemens Ladisch 15859d48582STakashi Iwaiconfig SND_SUPPORT_OLD_API 15959d48582STakashi Iwai bool "Support old ALSA API" 16059d48582STakashi Iwai default y 16159d48582STakashi Iwai help 16259d48582STakashi Iwai Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3 16359d48582STakashi Iwai or older). 16459d48582STakashi Iwai 16521a3479aSJaroslav Kyselaconfig SND_VERBOSE_PROCFS 16621a3479aSJaroslav Kysela bool "Verbose procfs contents" 16789fe5117STakashi Iwai depends on PROC_FS 16821a3479aSJaroslav Kysela default y 16921a3479aSJaroslav Kysela help 17021a3479aSJaroslav Kysela Say Y here to include code for verbose procfs contents (provides 171a982ac06SMatt LaPlante useful information to developers when a problem occurs). On the 17221a3479aSJaroslav Kysela other side, it makes the ALSA subsystem larger. 17321a3479aSJaroslav Kysela 1741da177e4SLinus Torvaldsconfig SND_VERBOSE_PRINTK 1751da177e4SLinus Torvalds bool "Verbose printk" 1761da177e4SLinus Torvalds help 1771da177e4SLinus Torvalds Say Y here to enable verbose log messages. These messages 1781da177e4SLinus Torvalds will help to identify source file and position containing 1791da177e4SLinus Torvalds printed messages. 1801da177e4SLinus Torvalds 1811da177e4SLinus Torvalds You don't need this unless you're debugging ALSA. 1821da177e4SLinus Torvalds 1831da177e4SLinus Torvaldsconfig SND_DEBUG 1841da177e4SLinus Torvalds bool "Debug" 1851da177e4SLinus Torvalds help 1861da177e4SLinus Torvalds Say Y here to enable ALSA debug code. 1871da177e4SLinus Torvalds 18862cf872aSTakashi Iwaiconfig SND_DEBUG_VERBOSE 18962cf872aSTakashi Iwai bool "More verbose debug" 1901da177e4SLinus Torvalds depends on SND_DEBUG 1911da177e4SLinus Torvalds help 19262cf872aSTakashi Iwai Say Y here to enable extra-verbose debugging messages. 19362cf872aSTakashi Iwai 19462cf872aSTakashi Iwai Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages. 19562cf872aSTakashi Iwai So, say Y only if you are ready to be annoyed. 19661fb63c0SJaroslav Kysela 19761fb63c0SJaroslav Kyselaconfig SND_PCM_XRUN_DEBUG 19861fb63c0SJaroslav Kysela bool "Enable PCM ring buffer overrun/underrun debugging" 19961fb63c0SJaroslav Kysela default n 200b7d90a35STakashi Iwai depends on SND_DEBUG && SND_VERBOSE_PROCFS 20161fb63c0SJaroslav Kysela help 20261fb63c0SJaroslav Kysela Say Y to enable the PCM ring buffer overrun/underrun debugging. 20361fb63c0SJaroslav Kysela It is usually not required, but if you have trouble with 20461fb63c0SJaroslav Kysela sound clicking when system is loaded, it may help to determine 20561fb63c0SJaroslav Kysela the process or driver which causes the scheduling gaps. 206e922b002STakashi Iwai 207e922b002STakashi Iwaiconfig SND_VMASTER 208e922b002STakashi Iwai bool 2090528c749SMichal Marek 21035be544aSTakashi Iwaiconfig SND_KCTL_JACK 21135be544aSTakashi Iwai bool 21235be544aSTakashi Iwai 213cc6a8acdSTakashi Iwaiconfig SND_DMA_SGBUF 214cc6a8acdSTakashi Iwai def_bool y 215cc6a8acdSTakashi Iwai depends on X86 216cc6a8acdSTakashi Iwai 2170528c749SMichal Mareksource "sound/core/seq/Kconfig" 218