Provided by: pulseaudio_6.0-0ubuntu13_i386 bug


       pulse-daemon.conf - PulseAudio daemon configuration file





       The  PulseAudio sound server reads configuration directives from a file
       ~/.config/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 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.


       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 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  disabled  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-1.  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 disabled when upmixing or downmixing ignore LFE
       channels. When this option is disabled 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 yes.

       lfe-crossover-freq= The crossover frequency (in Hz) for the LFE filter.
       Defaults to 120 Hz. Set it to 0 to disable the LFE filter.

       use-pid-file=   Create   a   PID   file   in   the   runtime  directory
       ($XDG_RUNTIME_DIR/pulse/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

       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
       privileges. Takes a boolean argument,  defaults  to  no.  The  --system
       command line argument takes precedence.

       local-server-type=  Please  don't use this option if you don't have to!
       This option is currently only useful when you want D-Bus clients to use
       a  remote server. This option may be removed in future versions. If you
       only want to run PulseAudio in the system mode, use the system-instance
       option.  This option takes one of user, system or none as the argument.
       This is essentially a duplicate for  the  system-instance  option.  The
       difference  is  the none option, which is useful when you want to use a
       remote server with D-Bus clients. If both this and system-instance  are
       defined, this option takes precedence. Defaults to whatever the system-
       instance is set.

       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.


       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.


       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

       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.


       dl-search-path=  The  path  where  to  look  for dynamic shared objects
       (DSOs/plugins). You may specify more than one path separated 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 ~/.config/pulse/,  and  if  that
       file  does  not  exist  fall  back to the system wide installed version
       /etc/pulse/  If   run   in   system-wide   mode   the   file
       /etc/pulse/  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.


       log-target= The default log target. Use either stderr, syslog,  journal
       (optional),  auto,  file:PATH  or  newfile:PATH. On traditional systems
       auto is equivalent to  syslog.  On  systemd-enabled  systems,  auto  is
       equivalent  to  journal,  in  case  daemonize is enabled, and to stderr
       otherwise. If set  to  file:PATH,  logging  is  directed  to  the  file
       indicated by PATH. newfile:PATH is otherwise the same as file:PATH, but
       existing files are never overwritten. If  the  specified  file  already
       exists,  a  suffix  is  added  to  the  file name to avoid overwriting.
       Defaults  to  auto.  The  --log-target  command   line   option   takes

       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 message 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 specified number of stack frames. Defaults to 0.


       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 priority of 9 by default.

       rlimit-rttime Defaults to 1000000.


       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  endianness 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.

       alternate-sample-rate The alternate sample frequency. Sinks and sources
       will  use either the default-sample-rate value or this alternate value,
       typically 44.1 or 48kHz. Switching between default and alternate values
       is  enabled  only  when the sinks/sources are suspended. This option is
       ignored in passthrough mode where the stream rate will be used. If  set
       to the same value as the default sample rate, this feature is disabled.


       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 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).


       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 hardware mixer changes  cannot
       be timed accurately and thus this change of volumes can sometimes 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.


       The   PulseAudio   Developers   <pulseaudio-discuss  (at)  lists  (dot)
       freedesktop    (dot)    org>;    PulseAudio    is    available     from


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