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  23
  24 <manpage name="pulse-daemon.conf" section="5" desc="PulseAudio daemon configuration file">
  25
  26   <synopsis>
  27     <p><file>~/.pulse/daemon.conf</file></p>
  28
  29     <p><file>@pulseconfdir@/daemon.conf</file></p>
  30   </synopsis>
  31
  32   <description>
  33     <p>The PulseAudio sound server reads configuration directives from
  34     a file <file>~/.pulse/daemon.conf</file> on startup and when that
  35     file doesn't exist from
  36     <file>@pulseconfdir@/daemon.conf</file>. Please note that the
  37     server also reads a configuration script on startup
  38     <file>default.pa</file> which also contains runtime configuration
  39     directives.</p>
  40
  41     <p>The configuration file is a simple collection of variable
  42     declarations. If the configuration file parser encounters either ;
  43     or # it ignores the rest of the line until its end.</p>
  44
  45     <p>For the settings that take a boolean argument the values
  46     <opt>true</opt>, <opt>yes</opt>, <opt>on</opt> and <opt>1</opt>
  47     are equivalent, resp. <opt>false</opt>, <opt>no</opt>,
  48     <opt>off</opt>, <opt>0</opt>.</p>
  49
  50   </description>
  51
  52   <section name="General Directives">
  53
  54     <option>
  55       <p><opt>daemonize= </opt> Daemonize after startup. Takes a
  56       boolean value, defaults to "no". The <opt>--daemonize</opt>
  57       command line option takes precedence.</p>
  58     </option>
  59
  60     <option>
  61       <p><opt>fail=</opt> Fail to start up if any of the directives
  62       in the configuration script <file>default.pa</file>
  63       fail. Takes a boolean argument, defaults to "yes". The <opt>--fail</opt> command line
  64       option takes precedence.</p>
  65     </option>
  66
  67     <option>
  68       <p><opt>disallow-module-loading=</opt> Disallow module loading
  69       after startup. This is a security feature that makes sure that
  70       no further modules may be loaded into the PulseAudio server
  71       after startup completed. It is recommended to enable this when
  72       <opt>system-instance</opt> is enabled. Please note that certain
  73       features like automatic hot-plug support will not work if this
  74       option is enabled. Takes a boolean argument, defaults to
  75       <opt>no</opt>. The <opt>--disallow-module-loading</opt> command line
  76       option takes precedence.</p>
  77     </option>
  78
  79     <option>
  80       <p><opt>disallow-exit=</opt> Disallow exit on user
  81       request. Defaults to <opt>no</opt>.</p>
  82     </option>
  83
  84     <option>
  85       <p><opt>resample-method=</opt> The resampling algorithm to
  86       use. Use one of <opt>src-sinc-best-quality</opt>,
  87       <opt>src-sinc-medium-quality</opt>, <opt>src-sinc-fastest</opt>,
  88       <opt>src-zero-order-hold</opt>, <opt>src-linear</opt>,
  89       <opt>trivial</opt>, <opt>speex-float-N</opt>,
  90       <opt>speex-fixed-N</opt>, <opt>ffmpeg</opt>. See the
  91       documentation of libsamplerate for an explanation for the
  92       different src- methods. The method <opt>trivial</opt> is the most basic
  93       algorithm implemented. If you're tight on CPU consider using
  94       this. On the other hand it has the worst quality of them
  95       all. The Speex resamplers take an integer quality setting in the
  96       range 0..9 (bad...good). They exist in two flavours: <opt>fixed</opt> and
  97       <opt>float</opt>. The former uses fixed point numbers, the latter relies on
  98       floating point numbers. On most desktop CPUs the float point
  99       resmampler is a lot faster, and it also offers slightly better
 100       quality. See the output of <opt>dump-resample-methods</opt> for
 101       a complete list of all available resamplers. Defaults to
 102       <opt>speex-float-3</opt>. The <opt>--resample-method</opt>
 103       command line option takes precedence. Note that some modules
 104       overwrite or allow overwriting of the resampler to use.</p>
 105     </option>
 106
 107     <option>
 108       <p><opt>disable-remixing=</opt> Never upmix or downmix channels
 109       to different channel maps. Instead, do a simple name-based
 110       matching only.</p>
 111     </option>
 112
 113     <option>
 114       <p><opt>disable-lfe-remixing=</opt> When upmixing or downmixing
 115       ignore LFE channels. When this option is on the output LFE
 116       channel will only get a signal when an input LFE channel is
 117       available as well. If no input LFE channel is available the
 118       output LFE channel will always be 0. If no output LFE channel is
 119       available the signal on the input LFE channel will be
 120       ignored. Defaults to "on".</p>
 121     </option>
 122
 123     <option>
 124       <p><opt>use-pid-file=</opt> Create a PID file in
 125       <file>/tmp/pulse-$USER/pid</file>. Of this is enabled you may
 126       use commands like <opt>--kill</opt> or <opt>--check</opt>. If
 127       you are planning to start more than one PulseAudio process per
 128       user, you better disable this option since it effectively
 129       disables multiple instances. Takes a boolean argument, defaults
 130       to <opt>yes</opt>. The <opt>--no-cpu-limit</opt> command line
 131       option takes precedence.</p>
 132     </option>
 133
 134     <option>
 135       <p><opt>no-cpu-limit=</opt> Do not install the CPU load limiter,
 136       even on platforms where it is supported. This option is useful
 137       when debugging/profiling PulseAudio to disable disturbing
 138       SIGXCPU signals. Takes a boolean argument, defaults to <opt>no</opt>. The
 139       <opt>--no-cpu-limit</opt> command line argument takes
 140       precedence.</p>
 141     </option>
 142
 143
 144     <option>
 145       <p><opt>system-instance=</opt> Run the daemon as system-wide
 146       instance, requires root priviliges. Takes a boolean argument,
 147       defaults to <opt>no</opt>. The <opt>--system</opt> command line
 148       argument takes precedence.</p>
 149     </option>
 150
 151
 152     <option>
 153       <p><opt>disable-shm=</opt> Disable data transfer via POSIX
 154       shared memory. Takes a boolean argument, defaults to
 155       <opt>no</opt>. The <opt>--disable-shm</opt> command line
 156       argument takes precedence.</p>
 157     </option>
 158
 159     <option>
 160       <p><opt>shm-size-bytes=</opt> Sets the shared memory segment
 161       size for the daemon, in bytes. If left unspecified or is set to 0
 162       it will default to some system-specific default, usually 64
 163       MiB. Please note that usually there is no need to change this
 164       value, unless you are running an OS kernel that does not do
 165       memory overcommit.</p>
 166     </option>
 167
 168   </section>
 169
 170   <section name="Scheduling">
 171
 172     <option>
 173       <p><opt>high-priority=</opt> Renice the daemon after startup to
 174       become a high-priority process. This a good idea if you
 175       experience drop-outs during playback. However, this is a certain
 176       security issue, since it works when called SUID root only, or
 177       RLIMIT_NICE is used. root is dropped immediately after gaining
 178       the nice level on startup, thus it is presumably safe. See
 179       <manref section="1" name="pulseaudio"/> for more
 180       information. Takes a boolean argument, defaults to "yes". The <opt>--high-priority</opt>
 181       command line option takes precedence.</p>
 182     </option>
 183
 184     <option>
 185       <p><opt>realtime-scheduling=</opt> Try to acquire SCHED_FIFO
 186       scheduling for the IO threads. The same security concerns as
 187       mentioned above apply. However, if PA enters an endless loop,
 188       realtime scheduling causes a system lockup. Thus, realtime
 189       scheduling should only be enabled on trusted machines for
 190       now. Please not that only the IO threads of PulseAudio are made
 191       real-time. The controlling thread is left a normally scheduled
 192       thread. Thus enabling the high-priority option is orthogonal.
 193       See <manref section="1" name="pulseaudio"/> for more
 194       information. Takes a boolean argument, defaults to "no". The
 195       <opt>--realtime</opt> command line option takes precedence.</p>
 196     </option>
 197
 198     <option>
 199       <p><opt>realtime-priority=</opt> The realtime priority to
 200       acquire, if <opt>realtime-scheduling</opt> is enabled. Note: JACK uses 10
 201       by default, 9 for clients. Thus it is recommended to choose the
 202       PulseAudio real-time priorities lower. Some PulseAudio threads
 203       might choose a priority a little lower or higher than the
 204       specified value. Defaults to "5".</p>
 205     </option>
 206
 207     <option>
 208       <p><opt>nice-level=</opt> The nice level to acquire for the
 209       daemon, if <opt>high-priority</opt> is enabled. Note: on some
 210       distributions X11 uses -10 by default. Defaults to -11.</p>
 211     </option>
 212
 213   </section>
 214
 215   <section name="Idle Times">
 216
 217     <option>
 218       <p><opt>exit-idle-time=</opt> Terminate the daemon after the
 219       last client quit and this time in seconds passed. Use a negative value to
 220       disable this feature. Defaults to -1. The
 221       <opt>--exit-idle-time</opt> command line option takes
 222       precedence.</p>
 223     </option>
 224
 225     <option>
 226       <p><opt>module-idle-time=</opt> Unload autoloaded modules after
 227       being idle for this time in seconds. Defaults to 20. The
 228       <opt>--module-idle-time</opt> command line option takes
 229       precedence.</p>
 230     </option>
 231
 232     <option>
 233       <p><opt>scache-idle-time=</opt> Unload autoloaded sample cache
 234       entries after being idle for this time in seconds. Defaults to
 235       20. The <opt>--scache-idle-time</opt> command line option takes
 236       precedence.</p>
 237     </option>
 238
 239   </section>
 240
 241   <section name="Paths">
 242
 243     <option>
 244       <p><opt>dl-search-path=</opt> The path were to look for dynamic
 245       shared objects (DSOs/plugins). You may specify more than one
 246       path seperated by colons. The default path depends on compile
 247       time settings. The <opt>--dl-search-path</opt> command line
 248       option takes precedence. </p>
 249     </option>
 250
 251     <option>
 252       <p><opt>default-script-file=</opt> The default configuration
 253       script file to load. Specify an empty string for not loading a
 254       default script file. The default behaviour is to load
 255       <file>~/.pulse/default.pa</file>, and if that file does not
 256       exist fall back to the system wide installed version
 257       <file>@pulseconfdir@/default.pa</file>. If run in system-wide
 258       mode the file <file>@pulseconfdir@/system.pa</file> is used
 259       instead. If <opt>-n</opt> is passed on the command line
 260       or <opt>default-script-file=</opt> is disabled the default
 261       configuration script is ignored.</p>
 262     </option>
 263
 264     <option>
 265       <p><opt>default-script-file=</opt> Load the default
 266       configuration script file as specified
 267       in <opt>default-script-file=</opt>. Defaults to "yes".</p>
 268     </option>
 269
 270   </section>
 271
 272   <section name="Logging">
 273
 274     <option>
 275       <p><opt>log-target=</opt> The default log target. Use either
 276       <opt>stderr</opt>, <opt>syslog</opt> or <opt>auto</opt>. The
 277       latter is equivalent to <opt>sylog</opt> in case
 278       <opt>daemonize</opt> is enabled, otherwise to
 279       <opt>stderr</opt>. Defaults to <opt>auto</opt>. The
 280       <opt>--log-target</opt> command line option takes
 281       precedence.</p>
 282     </option>
 283
 284     <option>
 285       <p><opt>log-level=</opt> Log level, one of <opt>debug</opt>,
 286       <opt>info</opt>, <opt>notice</opt>, <opt>warning</opt>,
 287       <opt>error</opt>. Log messages with a lower log level than
 288       specified here are not logged. Defaults to
 289       <opt>notice</opt>. The <opt>--log-level</opt> command line
 290       option takes precedence. The <opt>-v</opt> command line option
 291       might alter this setting.</p>
 292     </option>
 293
 294   </section>
 295
 296   <section name="Resource Limits">
 297
 298     <p>See <manref name="getrlimit" section="2"/> for
 299     more information. Set to -1 if PulseAudio shall not touch the resource
 300     limit. Not all resource limits are available on all operating
 301     systems.</p>
 302
 303     <option>
 304       <p><opt>rlimit-as</opt> Defaults to -1.</p>
 305     </option>
 306     <option>
 307       <p><opt>rlimit-rss</opt> Defaults to -1.</p>
 308     </option>
 309     <option>
 310       <p><opt>rlimit-core</opt> Defaults to -1.</p>
 311     </option>
 312     <option>
 313       <p><opt>rlimit-data</opt> Defaults to -1.</p>
 314     </option>
 315     <option>
 316       <p><opt>rlimit-fsize</opt> Defaults to -1.</p>
 317     </option>
 318     <option>
 319       <p><opt>rlimit-nofile</opt> Defaults to 256.</p>
 320     </option>
 321     <option>
 322       <p><opt>rlimit-stack</opt> Defaults to -1.</p>
 323     </option>
 324     <option>
 325       <p><opt>rlimit-nproc</opt> Defaults to -1.</p>
 326     </option>
 327     <option>
 328       <p><opt>rlimit-locks</opt> Defaults to -1.</p>
 329     </option>
 330     <option>
 331       <p><opt>rlimit-sigpending</opt> Defaults to -1.</p>
 332     </option>
 333     <option>
 334       <p><opt>rlimit-msgqueue</opt> Defaults to -1.</p>
 335     </option>
 336     <option>
 337       <p><opt>rlimit-memlock</opt> Defaults to 16 KiB. Please note
 338       that the JACK client libraries may require more locked
 339       memory.</p>
 340     </option>
 341     <option>
 342       <p><opt>rlimit-nice</opt> Defaults to 31. Please make sure that
 343       the default nice level as configured with <opt>nice-level</opt>
 344       fits in this resource limit, if <opt>high-priority</opt> is
 345       enabled.</p>
 346     </option>
 347     <option>
 348       <p><opt>rlimit-rtprio</opt> Defaults to 9. Please make sure that
 349       the default real-time priority level as configured with
 350       <opt>realtime-priority=</opt> fits in this resource limit, if
 351       <opt>realtime-scheduling</opt> is enabled. The JACK client
 352       libraries require a real-time prority of 9 by default. </p>
 353     </option>
 354     <option>
 355       <p><opt>rlimit-rttime</opt> Defaults to 1000000.</p>
 356     </option>
 357
 358   </section>
 359
 360   <section name="Default Device Settings">
 361
 362     <p>Most drivers try to open the audio device with these settings
 363     and then fall back to lower settings. The default settings are CD
 364     quality: 16bit native endian, 2 channels, 44100 Hz sampling.</p>
 365
 366     <option>
 367       <p><opt>default-sample-format=</opt> The default sampling
 368       format. Specify one of <opt>u8</opt>, <opt>s16le</opt>,
 369       <opt>s16be</opt>, <opt>s32le</opt>,
 370       <opt>s32be</opt>, <opt>float32le</opt>, <opt>float32be</opt>,
 371       <opt>ulaw</opt>, <opt>alaw</opt>. Depending on the endianess of
 372       the CPU the
 373       formats <opt>s16ne</opt>, <opt>s16re</opt>, <opt>s32ne</opt>, <opt>s32re</opt>,
 374       <opt>float32ne</opt>, <opt>float32re</opt> (for native,
 375       resp. reverse endian) are available as aliases.</p>
 376     </option>
 377
 378     <option>
 379       <p><opt>default-sample-rate=</opt> The default sample frequency.</p>
 380     </option>
 381
 382     <option>
 383       <p><opt>default-sample-channels</opt> The default number of channels.</p>
 384     </option>
 385
 386   </section>
 387
 388   <section name="Default Fragment Settings">
 389
 390     <p>Some hardware drivers require the hardware playback buffer to
 391     be subdivided into several fragments. It is possible to change
 392     these buffer metrics for machines with high scheduling
 393     latencies. Not all possible values that may be configured here are
 394     available in all hardware. The driver will to find the nearest
 395     setting supported.</p>
 396
 397     <option>
 398       <p><opt>default-fragments=</opt> The default number of
 399       fragments. Defaults to 4.</p>
 400     </option>
 401     <option>
 402       <p><opt>default-fragment-size-msec=</opt>The duration of a
 403       single fragment. Defaults to 25ms (i.e. the total buffer is thus
 404       100ms long).</p>
 405     </option>
 406
 407   </section>
 408
 409   <section name="Authors">
 410     <p>The PulseAudio Developers &lt;@PACKAGE_BUGREPORT@&gt;; PulseAudio is available from <url href="@PACKAGE_URL@"/></p>
 411   </section>
 412
 413   <section name="See also">
 414     <p>
 415       <manref name="pulse-client.conf" section="5"/>, <manref name="default.pa" section="5"/>, <manref name="pulseaudio" section="1"/>, <manref name="pacmd" section="1"/>
 416     </p>
 417   </section>
 418
 419 </manpage>