pulse-daemon.conf(5)         (User)          pulse-daemon.conf(5)

          pulse-daemon.conf - PulseAudio daemon configuration file





          The PulseAudio sound server reads configuration directives
          from a configuration file on startup. If the per-user file
          ~/.config/pulse/daemon.conf exists, it is used, otherwise
          the system configuration file /etc/pulse/daemon.conf is
          used. In addition to those main files, configuration
          directives can also be put in files under directories
          ~/.config/pulse/daemon.conf.d/ and
          /etc/pulse/daemon.conf.d/. Those files have to have the
          .conf file name extension, but otherwise the file names can
          be chosen freely. The files under daemon.conf.d are
          processed in alphabetical order. In case the same option is
          set in multiple files, the last file to set an option
          overrides earlier files. The main daemon.conf file is
          processed first, so options set in files under daemon.conf.d
          override the main file.

          Please note that the server also reads a configuration
          script on startup. See default.pa(5).

          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.

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

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

     startup. This is a security feature that if disabled makes sure

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     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-module-loading= Allow/disallow module loading after

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

     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, soxr-mq, soxr-hq, soxr-vhq. 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. The soxr-family methods are based on
     libsoxr, a resampler library from the SoX sound processing
     utility. The mq variant has the best performance of the three.
     The hq is more expensive and, according to SoX developers, is
     considered the best choice for audio of up to 16 bits per sample.
     The vhq variant has more precision than hq and is more suitable
     for larger samples. The Soxr resamplers generally offer better
     quality at less CPU compared to other resamplers, such as speex.
     The downside is that they can add a significant delay to the
     output (usually up to around 20 ms, in rare cases more). 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.
          resample-method= The resampling algorithm to use. Use one of

     resampling. This only works on devices which support
     reconfiguring their rate, and when no other streams are already
     playing or capturing audio. The device will also not be
     configured to a rate less than the default and alternate sample
               resampling= If set, try to configure the device to avoid

     different channel maps. Instead, do a simple name-based matching
     only. Defaults to yes. There is no known valid use case for
     setting this option to no, therefore, this option is deprecated
     and may be removed in a future version of PulseAudio.

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               remixing= If disabled never upmix or downmix channels to

     when remixing. Otherwise, remix to the minimal set of sink
     channels needed to reproduce all of the source channels. (This
     has no effect on LFE remixing.) Defaults to yes.
               channels= If enabled, use all sink channels

     and remixing-consume-lfe to the same value at once. This option
     only exists for backward compatibility and may be removed in a
     future version of PulseAudio.
          enable-lfe-remixing= This is a way to set remixing-produce-

     have the LFE channel, synthesize the output LFE channel as a
     (lowpass-filtered, if lfe-crossover-freq is not 0) average of all
     input channels. Also, when lfe-crossover-freq is not 0, filter
     out low frequencies from other channels while producing a
     synthetic LFE output. If disabled, the output LFE channel will
     only get a signal when an input LFE channel is available as well.
     Defaults to no.
               lfe= If enabled, and the sink input does not

     LFE channel, redirect the input LFE channel (if any) to other
     channels. If disabled, the input LFE channel will remain unused
     unless the sink has the LFE channel as well. Defaults to no.
               lfe= If enabled, and the sink does not have an

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

     ($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 precedence.
          use-pid-file= Create a PID file in the runtime directory

     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.
               limit= If disabled do not install the CPU load limiter, even

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

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               wide instance, requires

     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.
               type= Please don't use this option if you don't have

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

     argument, defaults to yes.
          enable-memfd=. Enable memfd shared memory. Takes a boolean

     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.
          shm-size-bytes= Sets the shared memory segment size for the

     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.
               memory= Locks the entire PulseAudio process into memory.

     sink volume equal the maximum of the volumes of the inputs
     connected to it. Takes a boolean argument, defaults to no.
               volumes= Enable 'flat' volumes, i.e. where possible let the

     source becomes unavailable. Takes a boolean argument. If set to
     yes, pulseaudio will try to move the streams from a sink or
     source that becomes unavailable to the default sink or source. If
     set to no, streams will be killed if the corresponding sink or
     source disappears. Defaults to yes.
               streams= Enable rescuing of streams if the used sink or

     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

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     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.
               priority= Renice the daemon after startup to become a high-

     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 note 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.
               scheduling= Try to acquire SCHED_FIFO scheduling for the

     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.
          realtime-priority= The realtime priority to acquire, if

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

     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.
               time= Terminate the daemon after the last client quit

               When PulseAudio runs in the per-user mode and detects a
               login session, then any positive value will be reset to
               0 so that PulseAudio will terminate immediately on
               logout. A positive value therefore has effect only in
               environments where there's no support for login session
               tracking (or if the user is logged in without a session
               spawned, a.k.a. lingering). A negative value can still
               be used to disable any automatic exit.

               When PulseAudio runs in the system mode, automatic exit
               is always disabled, so this option does nothing.

     being idle for this time in seconds. Defaults to 20. The --
     scache-idle-time command line option takes precedence.

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               time= Unload autoloaded sample cache entries after

     (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.
               path= The path where to look for dynamic shared objects

     load. Specify an empty string for not loading a default script
     file. The default behaviour is to load
     ~/.config/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.
               file= The default configuration script file to

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

     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 precedence.
               target= The default log target. Use either stderr, syslog,

     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
               level= Log level, one of debug, info, notice, warning, error.

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

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

     a code stack trace up the specified number of stack frames.

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     Defaults to 0.
               backtrace= When greater than 0, with each logged message log

          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.

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

     nice level as configured with nice-level fits in this resource
     limit, if high-priority is enabled.
               nice Defaults to 31. 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
               rtprio Defaults to 9. Please make sure that the 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,

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          44100 Hz sampling.

     for possible values.
          default-sample-format= The default sampling format. See

          default-sample-rate= The default sample frequency.

          default-sample-channels The default number of channels.

          default-channel-map The default channel map.

     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
               rate The alternate sample frequency. Sinks and

          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.

               fragments= The default number of fragments. Defaults to

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

          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.

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

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

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

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

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

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