linux/sound/core/Kconfig
<<
>>
Prefs
   1# ALSA soundcard-configuration
   2config SND_TIMER
   3        tristate
   4        depends on SND
   5
   6config SND_PCM
   7        tristate
   8        select SND_TIMER
   9        depends on SND
  10
  11config SND_HWDEP
  12        tristate
  13        depends on SND
  14
  15config SND_RAWMIDI
  16        tristate
  17        depends on SND
  18
  19config SND_SEQUENCER
  20        tristate "Sequencer support"
  21        depends on SND
  22        select SND_TIMER
  23        help
  24          Say Y or M to enable MIDI sequencer and router support.  This
  25          feature allows routing and enqueueing of MIDI events.  Events
  26          can be processed at a given time.
  27
  28          Many programs require this feature, so you should enable it
  29          unless you know what you're doing.
  30
  31config SND_SEQ_DUMMY
  32        tristate "Sequencer dummy client"
  33        depends on SND_SEQUENCER
  34        help
  35          Say Y here to enable the dummy sequencer client.  This client
  36          is a simple MIDI-through client: all normal input events are
  37          redirected to the output port immediately.
  38
  39          You don't need this unless you want to connect many MIDI
  40          devices or applications together.
  41
  42          To compile this driver as a module, choose M here: the module
  43          will be called snd-seq-dummy.
  44
  45config SND_OSSEMUL
  46        bool
  47        depends on SND
  48
  49config SND_MIXER_OSS
  50        tristate "OSS Mixer API"
  51        depends on SND
  52        select SND_OSSEMUL
  53        help
  54          To enable OSS mixer API emulation (/dev/mixer*), say Y here
  55          and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
  56
  57          Many programs still use the OSS API, so say Y.
  58
  59          To compile this driver as a module, choose M here: the module
  60          will be called snd-mixer-oss.
  61
  62config SND_PCM_OSS
  63        tristate "OSS PCM (digital audio) API"
  64        depends on SND
  65        select SND_OSSEMUL
  66        select SND_PCM
  67        help
  68          To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y
  69          here and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
  70
  71          Many programs still use the OSS API, so say Y.
  72
  73          To compile this driver as a module, choose M here: the module
  74          will be called snd-pcm-oss.
  75
  76config SND_PCM_OSS_PLUGINS
  77        bool "OSS PCM (digital audio) API - Include plugin system"
  78        depends on SND_PCM_OSS
  79        default y
  80        help
  81          If you disable this option, the ALSA's OSS PCM API will not
  82          support conversion of channels, formats and rates. It will
  83          behave like most of new OSS/Free drivers in 2.4/2.6 kernels.
  84
  85config SND_SEQUENCER_OSS
  86        bool "OSS Sequencer API"
  87        depends on SND && SND_SEQUENCER
  88        select SND_OSSEMUL
  89        help
  90          Say Y here to enable OSS sequencer emulation (both
  91          /dev/sequencer and /dev/music interfaces).
  92
  93          Many programs still use the OSS API, so say Y.
  94
  95          If you choose M in "Sequencer support" (SND_SEQUENCER),
  96          this will be compiled as a module. The module will be called
  97          snd-seq-oss.
  98
  99config SND_RTCTIMER
 100        tristate "RTC Timer support"
 101        depends on SND && RTC
 102        select SND_TIMER
 103        help
 104          Say Y here to enable RTC timer support for ALSA.  ALSA uses
 105          the RTC timer as a precise timing source and maps the RTC
 106          timer to ALSA's timer interface.  The ALSA sequencer code also
 107          can use this timing source.
 108
 109          To compile this driver as a module, choose M here: the module
 110          will be called snd-rtctimer.
 111
 112config SND_SEQ_RTCTIMER_DEFAULT
 113        bool "Use RTC as default sequencer timer"
 114        depends on SND_RTCTIMER && SND_SEQUENCER
 115        default y
 116        help
 117          Say Y here to use the RTC timer as the default sequencer
 118          timer.  This is strongly recommended because it ensures
 119          precise MIDI timing even when the system timer runs at less
 120          than 1000 Hz.
 121
 122          If in doubt, say Y.
 123
 124config SND_DYNAMIC_MINORS
 125        bool "Dynamic device file minor numbers"
 126        depends on SND
 127        help
 128          If you say Y here, the minor numbers of ALSA device files in
 129          /dev/snd/ are allocated dynamically.  This allows you to have
 130          more than 8 sound cards, but requires a dynamic device file
 131          system like udev.
 132
 133          If you are unsure about this, say N here.
 134
 135config SND_SUPPORT_OLD_API
 136        bool "Support old ALSA API"
 137        depends on SND
 138        default y
 139        help
 140          Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3
 141          or older).
 142
 143config SND_VERBOSE_PROCFS
 144        bool "Verbose procfs contents"
 145        depends on SND && PROC_FS
 146        default y
 147        help
 148          Say Y here to include code for verbose procfs contents (provides
 149          useful information to developers when a problem occurs).  On the
 150          other side, it makes the ALSA subsystem larger.
 151
 152config SND_VERBOSE_PRINTK
 153        bool "Verbose printk"
 154        depends on SND
 155        help
 156          Say Y here to enable verbose log messages.  These messages
 157          will help to identify source file and position containing
 158          printed messages.
 159
 160          You don't need this unless you're debugging ALSA.
 161
 162config SND_DEBUG
 163        bool "Debug"
 164        depends on SND
 165        help
 166          Say Y here to enable ALSA debug code.
 167
 168config SND_DEBUG_DETECT
 169        bool "Debug detection"
 170        depends on SND_DEBUG
 171        help
 172          Say Y here to enable extra-verbose log messages printed when
 173          detecting devices.
 174
 175config SND_PCM_XRUN_DEBUG
 176        bool "Enable PCM ring buffer overrun/underrun debugging"
 177        default n
 178        depends on SND_DEBUG && SND_VERBOSE_PROCFS
 179        help
 180          Say Y to enable the PCM ring buffer overrun/underrun debugging.
 181          It is usually not required, but if you have trouble with
 182          sound clicking when system is loaded, it may help to determine
 183          the process or driver which causes the scheduling gaps.
 184