Provided by: pulseaudio_1.1-0ubuntu15_amd64 bug

NAME

       pulse-daemon.conf - PulseAudio daemon configuration file

SYNOPSIS

       ~/.pulse/daemon.conf

       /etc/pulse/daemon.conf

DESCRIPTION

       The    PulseAudio    sound   server   reads   configuration   directives   from   a   file
       ~/.pulse/daemon.conf   on   startup   and   when   that   file    doesn't    exist    from
       /etc/pulse/daemon.conf.  Please  note that the server also reads a configuration script on
       startup default.pa which also contains runtime configuration directives.

       The  configuration  file  is  a  simple  collection  of  variable  declarations.  If   the
       configuration  file  parser encounters either ; or # it ignores the rest of the line until
       its end.

       For the settings that take a  boolean  argument  the  values  true,  yes,  on  and  1  are
       equivalent, resp. false, no, off, 0.

GENERAL DIRECTIVES

       daemonize=   Daemonize  after  startup.  Takes  a  boolean  value,  defaults  to  no.  The
       --daemonize command line option takes precedence.

       fail= Fail to start up if any of the directives in  the  configuration  script  default.pa
       fail.  Takes  a  boolean  argument,  defaults to yes. The --fail command line option takes
       precedence.

       allow-module-loading= Allow/disallow module loading after  startup.  This  is  a  security
       feature  that  if  dsabled  makes  sure  that  no  further  modules may be loaded into the
       PulseAudio server after startup completed. It is recommended to disable this when  system-
       instance  is  enabled.  Please  note that certain features like automatic hot-plug support
       will not work if this option is enabled. Takes a boolean argument, defaults  to  yes.  The
       --disallow-module-loading command line option takes precedence.

       allow-exit= Allow/disallow exit on user request. Defaults to yes.

       resample-method=  The  resampling algorithm to use. Use one of src-sinc-best-quality, src-
       sinc-medium-quality, src-sinc-fastest, src-zero-order-hold,  src-linear,  trivial,  speex-
       float-N,  speex-fixed-N,  ffmpeg.  See  the  documentation  of libsamplerate and speex for
       explanations of the different src- and speex- methods, respectively. The method trivial is
       the  most  basic algorithm implemented. If you're tight on CPU consider using this. On the
       other hand it has the worst quality of them all. The  Speex  resamplers  take  an  integer
       quality  setting  in  the  range 0..10 (bad...good). They exist in two flavours: fixed and
       float. The former uses fixed point numbers, the latter relies on floating  point  numbers.
       On  most  desktop  CPUs  the  float  point  resampler  is a lot faster, and it also offers
       slightly better quality. See the output of dump-resample-methods for a  complete  list  of
       all  available  resamplers.  Defaults to speex-float-3. The --resample-method command line
       option takes precedence. Note that some modules overwrite  or  allow  overwriting  of  the
       resampler to use.

       enable-remixing=  If  disabled  never upmix or downmix channels to different channel maps.
       Instead, do a simple name-based matching only. Defaults to yes.

       enable-lfe-remixing= if disabeld when upmixing or downmixing  ignore  LFE  channels.  When
       this  option  is  dsabled  the output LFE channel will only get a signal when an input LFE
       channel is available as well. If no input LFE channel is available the output LFE  channel
       will  always  be  0.  If  no  output  LFE channel is available the signal on the input LFE
       channel will be ignored. Defaults to no.

       use-pid-file= Create a PID file in the runtime directory ($HOME/.pulse/*-runtime/pid).  If
       this  is enabled you may use commands like --kill or --check. If you are planning to start
       more than one PulseAudio process per  user,  you  better  disable  this  option  since  it
       effectively  disables  multiple  instances. Takes a boolean argument, defaults to yes. The
       --use-pid-file command line option takes precedence.

       cpu-limit= If disabled do not install the CPU load limiter, even on platforms where it  is
       supported. This option is useful when debugging/profiling PulseAudio to disable disturbing
       SIGXCPU signals. Takes a boolean argument, defaults to no. The --no-cpu-limit command line
       argument takes precedence.

       system-instance= Run the daemon as system-wide instance, requires root priviliges. Takes a
       boolean argument, defaults to no. The --system command line argument takes precedence.

       enable-shm= Enable data transfer via  POSIX  shared  memory.  Takes  a  boolean  argument,
       defaults to yes. The --disable-shm command line argument takes precedence.

       shm-size-bytes=  Sets  the  shared  memory  segment size for the daemon, in bytes. If left
       unspecified or is set to 0 it will default to some  system-specific  default,  usually  64
       MiB.  Please  note  that  usually  there  is  no need to change this value, unless you are
       running an OS kernel that does not do memory overcommit.

       lock-memory= Locks the entire PulseAudio process into memory. While  this  might  increase
       drop-out  safety  when used in conjunction with real-time scheduling this takes away a lot
       of memory from other processes  and  might  hence  considerably  slow  down  your  system.
       Defaults to no.

       flat-volumes=  Enable  'flat'  volumes,  i.e. where possible let the sink volume equal the
       maximum of the volumes of the inputs connected to it. Takes a boolean  argument,  defaults
       to yes.

SCHEDULING

       high-priority=  Renice  the daemon after startup to become a high-priority process. This a
       good idea if you experience drop-outs during playback. However, this is a certain security
       issue,  since it works when called SUID root only, or RLIMIT_NICE is used. root is dropped
       immediately after gaining the nice level on startup,  thus  it  is  presumably  safe.  See
       pulseaudio(1) for more information. Takes a boolean argument, defaults to yes. The --high-
       priority command line option takes precedence.

       realtime-scheduling= Try to acquire SCHED_FIFO scheduling for the  IO  threads.  The  same
       security  concerns  as  mentioned  above  apply.  However,  if  PA enters an endless loop,
       realtime scheduling causes a system lockup.  Thus,  realtime  scheduling  should  only  be
       enabled on trusted machines for now. Please not that only the IO threads of PulseAudio are
       made real-time. The controlling thread is left a normally scheduled thread. Thus  enabling
       the  high-priority  option  is orthogonal. See pulseaudio(1) for more information. Takes a
       boolean argument, defaults to yes. The --realtime command line option takes precedence.

       realtime-priority= The realtime priority to acquire, if  realtime-scheduling  is  enabled.
       Note:  JACK  uses  10  by  default,  9  for  clients. Thus it is recommended to choose the
       PulseAudio real-time priorities lower. Some PulseAudio threads might choose a  priority  a
       little lower or higher than the specified value. Defaults to 5.

       nice-level=  The  nice level to acquire for the daemon, if high-priority is enabled. Note:
       on some distributions X11 uses -10 by default. Defaults to -11.

IDLE TIMES

       exit-idle-time= Terminate the daemon after the last client quit and this time  in  seconds
       passed. Use a negative value to disable this feature. Defaults to 20. The --exit-idle-time
       command line option takes precedence.

       scache-idle-time= Unload autoloaded sample cache entries after being idle for this time in
       seconds. Defaults to 20. The --scache-idle-time command line option takes precedence.

PATHS

       dl-search-path=  The  path were to look for dynamic shared objects (DSOs/plugins). You may
       specify more than one path seperated by colons. The default path depends on  compile  time
       settings. The --dl-search-path command line option takes precedence.

       default-script-file=  The  default  configuration  script  file  to load. Specify an empty
       string for  not  loading  a  default  script  file.  The  default  behaviour  is  to  load
       ~/.pulse/default.pa,  and  if  that  file  does  not  exist  fall  back to the system wide
       installed  version  /etc/pulse/default.pa.  If  run   in   system-wide   mode   the   file
       /etc/pulse/system.pa  is  used  instead.  If  -n is passed on the command line or default-
       script-file= is disabled the default configuration script is ignored.

       load-default-script-file= Load the default  configuration  script  file  as  specified  in
       default-script-file=. Defaults to yes.

LOGGING

       log-target=  The  default  log  target.  Use  either stderr, syslog or auto. The latter is
       equivalent to sylog in case daemonize is enabled, otherwise to stderr. Defaults  to  auto.
       The --log-target command line option takes precedence.

       log-level=  Log  level,  one  of  debug, info, notice, warning, error. Log messages with a
       lower log level than specified here are not logged. Defaults to  notice.  The  --log-level
       command line option takes precedence. The -v command line option might alter this setting.

       log-meta=  With  each logged message log the code location the message was generated from.
       Defaults to no.

       log-time= With each logged messages log the relative time since startup. Defaults to no.

       log-backtrace= When greater than 0, with each logged message log a code stack trace up the
       the specified number of stack frames. Defaults to 0.

RESOURCE LIMITS

       See  getrlimit(2)  for  more  information.  Set  to  -1  if PulseAudio shall not touch the
       resource limit. Not all resource limits are available on all operating systems.

       rlimit-as Defaults to -1.

       rlimit-rss Defaults to -1.

       rlimit-core Defaults to -1.

       rlimit-data Defaults to -1.

       rlimit-fsize Defaults to -1.

       rlimit-nofile Defaults to 256.

       rlimit-stack Defaults to -1.

       rlimit-nproc Defaults to -1.

       rlimit-locks Defaults to -1.

       rlimit-sigpending Defaults to -1.

       rlimit-msgqueue Defaults to -1.

       rlimit-memlock Defaults to 16 KiB. Please note that the JACK client libraries may  require
       more locked memory.

       rlimit-nice  Defaults  to  31.  Please make sure that the default nice level as configured
       with nice-level fits in this resource limit, if high-priority is enabled.

       rlimit-rtprio Defaults to 9. Please make sure that the default real-time priority level as
       configured  with realtime-priority= fits in this resource limit, if realtime-scheduling is
       enabled. The JACK client libraries require a real-time prority of 9 by default.

       rlimit-rttime Defaults to 1000000.

DEFAULT DEVICE SETTINGS

       Most drivers try to open the audio device with these settings and then fall back to  lower
       settings.  The  default settings are CD quality: 16bit native endian, 2 channels, 44100 Hz
       sampling.

       default-sample-format= The default sampling format.  Specify  one  of  u8,  s16le,  s16be,
       s24le, s24be, s24-32le, s24-32be, s32le, s32be float32le, float32be, ulaw, alaw. Depending
       on the endianess of the CPU the formats s16ne, s16re, s24ne,  s24re,  s24-32ne,  s24-32re,
       s32ne,  s32re,  float32ne,  float32re  (for native, resp. reverse endian) are available as
       aliases.

       default-sample-rate= The default sample frequency.

       default-sample-channels The default number of channels.

       default-channel-map The default channel map.

DEFAULT FRAGMENT SETTINGS

       Some hardware drivers require the hardware playback buffer to be subdivided  into  several
       fragments. It is possible to change these buffer metrics for machines with high scheduling
       latencies. Not all possible values that may  be  configured  here  are  available  in  all
       hardware.  The  driver  will  to  find  the nearest setting supported. Modern drivers that
       support timer-based scheduling ignore these options.

       default-fragments= The default number of fragments. Defaults to 4.

       default-fragment-size-msec=The duration of a single fragment. Defaults to 25ms  (i.e.  the
       total buffer is thus 100ms long).

DEFAULT DEFERRED VOLUME SETTINGS

       With  the  flat volume feature enabled, the sink HW volume is set to the same level as the
       highest volume input stream. Any other streams (with lower volumes) have  the  appropriate
       adjustment  applied  in SW to bring them to the correct overall level. Sadly hadware mixer
       changes cannot be timed accurately and thus this change of volumes can somtimes cause  the
       resulting  output  sound  to  be  momentarily too loud or too soft. So to ensure SW and HW
       volumes are applied concurrently without any  glitches,  their  application  needs  to  be
       synchronized.  The  sink  implementation  needs to support deferred volumes. The following
       parameters can be used to refine the process.

       enable-deferred-volume= Enable deferred volume for the sinks that support it. This feature
       is enabled by default.

       deferred-volume-safety-margin-usec=  The  amount  of time (in usec) by which the HW volume
       increases are delayed and HW volume decreases are advanced. Defaults to 8000 usec.

       deferred-volume-extra-delay-usec= The amount of time (in usec) by which HW volume  changes
       are delayed. Negative values are also allowed. Defaults to 0.

AUTHORS

       The  PulseAudio Developers <mzchyfrnhqvb (at) 0pointer (dot) net>; PulseAudio is available
       from http://pulseaudio.org/

SEE ALSO

       pulse-client.conf(5), default.pa(5), pulseaudio(1), pacmd(1)