sound/core/Kconfig

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