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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     <option>
 144       <p><opt>system-instance=</opt> Run the daemon as system-wide
 145       instance, requires root priviliges. Takes a boolean argument,
 146       defaults to <opt>no</opt>. The <opt>--system</opt> command line
 147       argument takes precedence.</p>
 148     </option>
 149
 150     <option>
 151       <p><opt>disable-shm=</opt> Disable data transfer via POSIX
 152       shared memory. Takes a boolean argument, defaults to
 153       <opt>no</opt>. The <opt>--disable-shm</opt> command line
 154       argument takes precedence.</p>
 155     </option>
 156
 157     <option>
 158       <p><opt>shm-size-bytes=</opt> Sets the shared memory segment
 159       size for the daemon, in bytes. If left unspecified or is set to 0
 160       it will default to some system-specific default, usually 64
 161       MiB. Please note that usually there is no need to change this
 162       value, unless you are running an OS kernel that does not do
 163       memory overcommit.</p>
 164     </option>
 165
 166     <option>
 167       <p><opt>lock-memory=</opt> Locks the entire PulseAudio process
 168       into memory. While this might increase drop-out safety when used
 169       in conjunction with real-time scheduling this takes away a lot
 170       of memory from other processes and might hence considerably slow
 171       down your system. Defaults to <opt>no</opt>.</p>
 172     </option>
 173
 174     <option>
 175       <p><opt>flat-volumes=</opt> Enable 'flat' volumes, i.e. where
 176       possible let the sink volume equal the maximum of the volumes of
 177       the inputs connected to it. Takes a boolean argument, defaults
 178       to <opt>yes</opt>.</p>
 179     </option>
 180
 181   </section>
 182
 183   <section name="Scheduling">
 184
 185     <option>
 186       <p><opt>high-priority=</opt> Renice the daemon after startup to
 187       become a high-priority process. This a good idea if you
 188       experience drop-outs during playback. However, this is a certain
 189       security issue, since it works when called SUID root only, or
 190       RLIMIT_NICE is used. root is dropped immediately after gaining
 191       the nice level on startup, thus it is presumably safe. See
 192       <manref section="1" name="pulseaudio"/> for more
 193       information. Takes a boolean argument, defaults to "yes". The <opt>--high-priority</opt>
 194       command line option takes precedence.</p>
 195     </option>
 196
 197     <option>
 198       <p><opt>realtime-scheduling=</opt> Try to acquire SCHED_FIFO
 199       scheduling for the IO threads. The same security concerns as
 200       mentioned above apply. However, if PA enters an endless loop,
 201       realtime scheduling causes a system lockup. Thus, realtime
 202       scheduling should only be enabled on trusted machines for
 203       now. Please not that only the IO threads of PulseAudio are made
 204       real-time. The controlling thread is left a normally scheduled
 205       thread. Thus enabling the high-priority option is orthogonal.
 206       See <manref section="1" name="pulseaudio"/> for more
 207       information. Takes a boolean argument, defaults to "no". The
 208       <opt>--realtime</opt> command line option takes precedence.</p>
 209     </option>
 210
 211     <option>
 212       <p><opt>realtime-priority=</opt> The realtime priority to
 213       acquire, if <opt>realtime-scheduling</opt> is enabled. Note: JACK uses 10
 214       by default, 9 for clients. Thus it is recommended to choose the
 215       PulseAudio real-time priorities lower. Some PulseAudio threads
 216       might choose a priority a little lower or higher than the
 217       specified value. Defaults to "5".</p>
 218     </option>
 219
 220     <option>
 221       <p><opt>nice-level=</opt> The nice level to acquire for the
 222       daemon, if <opt>high-priority</opt> is enabled. Note: on some
 223       distributions X11 uses -10 by default. Defaults to -11.</p>
 224     </option>
 225
 226   </section>
 227
 228   <section name="Idle Times">
 229
 230     <option>
 231       <p><opt>exit-idle-time=</opt> Terminate the daemon after the
 232       last client quit and this time in seconds passed. Use a negative value to
 233       disable this feature. Defaults to -1. The
 234       <opt>--exit-idle-time</opt> command line option takes
 235       precedence.</p>
 236     </option>
 237
 238     <option>
 239       <p><opt>scache-idle-time=</opt> Unload autoloaded sample cache
 240       entries after being idle for this time in seconds. Defaults to
 241       20. The <opt>--scache-idle-time</opt> command line option takes
 242       precedence.</p>
 243     </option>
 244
 245   </section>
 246
 247   <section name="Paths">
 248
 249     <option>
 250       <p><opt>dl-search-path=</opt> The path were to look for dynamic
 251       shared objects (DSOs/plugins). You may specify more than one
 252       path seperated by colons. The default path depends on compile
 253       time settings. The <opt>--dl-search-path</opt> command line
 254       option takes precedence. </p>
 255     </option>
 256
 257     <option>
 258       <p><opt>default-script-file=</opt> The default configuration
 259       script file to load. Specify an empty string for not loading a
 260       default script file. The default behaviour is to load
 261       <file>~/.pulse/default.pa</file>, and if that file does not
 262       exist fall back to the system wide installed version
 263       <file>@pulseconfdir@/default.pa</file>. If run in system-wide
 264       mode the file <file>@pulseconfdir@/system.pa</file> is used
 265       instead. If <opt>-n</opt> is passed on the command line
 266       or <opt>default-script-file=</opt> is disabled the default
 267       configuration script is ignored.</p>
 268     </option>
 269
 270     <option>
 271       <p><opt>load-default-script-file=</opt> Load the default
 272       configuration script file as specified
 273       in <opt>default-script-file=</opt>. Defaults to <opt>yes</opt>.</p>
 274     </option>
 275
 276   </section>
 277
 278   <section name="Logging">
 279
 280     <option>
 281       <p><opt>log-target=</opt> The default log target. Use either
 282       <opt>stderr</opt>, <opt>syslog</opt> or <opt>auto</opt>. The
 283       latter is equivalent to <opt>sylog</opt> in case
 284       <opt>daemonize</opt> is enabled, otherwise to
 285       <opt>stderr</opt>. Defaults to <opt>auto</opt>. The
 286       <opt>--log-target</opt> command line option takes
 287       precedence.</p>
 288     </option>
 289
 290     <option>
 291       <p><opt>log-level=</opt> Log level, one of <opt>debug</opt>,
 292       <opt>info</opt>, <opt>notice</opt>, <opt>warning</opt>,
 293       <opt>error</opt>. Log messages with a lower log level than
 294       specified here are not logged. Defaults to
 295       <opt>notice</opt>. The <opt>--log-level</opt> command line
 296       option takes precedence. The <opt>-v</opt> command line option
 297       might alter this setting.</p>
 298     </option>
 299
 300     <option>
 301       <p><opt>log-meta=</opt> With each logged message log the code
 302       location the message was generated from. Defaults to
 303       <opt>no</opt>.</p>
 304     </option>
 305
 306     <option>
 307       <p><opt>log-time=</opt> With each logged messages log the
 308       relative time since startup. Defaults to <opt>no</opt>.</p>
 309     </option>
 310
 311     <option>
 312       <p><opt>log-backtrace=</opt> When greater than 0, with each
 313       logged message log a code stack trace up the the specified
 314       number of stack frames. Defaults to <opt>0</opt>.</p>
 315     </option>
 316
 317   </section>
 318
 319   <section name="Resource Limits">
 320
 321     <p>See <manref name="getrlimit" section="2"/> for
 322     more information. Set to -1 if PulseAudio shall not touch the resource
 323     limit. Not all resource limits are available on all operating
 324     systems.</p>
 325
 326     <option>
 327       <p><opt>rlimit-as</opt> Defaults to -1.</p>
 328     </option>
 329     <option>
 330       <p><opt>rlimit-rss</opt> Defaults to -1.</p>
 331     </option>
 332     <option>
 333       <p><opt>rlimit-core</opt> Defaults to -1.</p>
 334     </option>
 335     <option>
 336       <p><opt>rlimit-data</opt> Defaults to -1.</p>
 337     </option>
 338     <option>
 339       <p><opt>rlimit-fsize</opt> Defaults to -1.</p>
 340     </option>
 341     <option>
 342       <p><opt>rlimit-nofile</opt> Defaults to 256.</p>
 343     </option>
 344     <option>
 345       <p><opt>rlimit-stack</opt> Defaults to -1.</p>
 346     </option>
 347     <option>
 348       <p><opt>rlimit-nproc</opt> Defaults to -1.</p>
 349     </option>
 350     <option>
 351       <p><opt>rlimit-locks</opt> Defaults to -1.</p>
 352     </option>
 353     <option>
 354       <p><opt>rlimit-sigpending</opt> Defaults to -1.</p>
 355     </option>
 356     <option>
 357       <p><opt>rlimit-msgqueue</opt> Defaults to -1.</p>
 358     </option>
 359     <option>
 360       <p><opt>rlimit-memlock</opt> Defaults to 16 KiB. Please note
 361       that the JACK client libraries may require more locked
 362       memory.</p>
 363     </option>
 364     <option>
 365       <p><opt>rlimit-nice</opt> Defaults to 31. Please make sure that
 366       the default nice level as configured with <opt>nice-level</opt>
 367       fits in this resource limit, if <opt>high-priority</opt> is
 368       enabled.</p>
 369     </option>
 370     <option>
 371       <p><opt>rlimit-rtprio</opt> Defaults to 9. Please make sure that
 372       the default real-time priority level as configured with
 373       <opt>realtime-priority=</opt> fits in this resource limit, if
 374       <opt>realtime-scheduling</opt> is enabled. The JACK client
 375       libraries require a real-time prority of 9 by default. </p>
 376     </option>
 377     <option>
 378       <p><opt>rlimit-rttime</opt> Defaults to 1000000.</p>
 379     </option>
 380
 381   </section>
 382
 383   <section name="Default Device Settings">
 384
 385     <p>Most drivers try to open the audio device with these settings
 386     and then fall back to lower settings. The default settings are CD
 387     quality: 16bit native endian, 2 channels, 44100 Hz sampling.</p>
 388
 389     <option>
 390       <p><opt>default-sample-format=</opt> The default sampling
 391       format. Specify one of <opt>u8</opt>, <opt>s16le</opt>,
 392       <opt>s16be</opt>, <opt>s24le</opt>, <opt>s24be</opt>,
 393       <opt>s24-32le</opt>, <opt>s24-32be</opt>, <opt>s32le</opt>,
 394       <opt>s32be</opt> <opt>float32le</opt>, <opt>float32be</opt>,
 395       <opt>ulaw</opt>, <opt>alaw</opt>. Depending on the endianess of
 396       the CPU the formats <opt>s16ne</opt>, <opt>s16re</opt>,
 397       <opt>s24ne</opt>, <opt>s24re</opt>, <opt>s24-32ne</opt>,
 398       <opt>s24-32re</opt>, <opt>s32ne</opt>, <opt>s32re</opt>,
 399       <opt>float32ne</opt>, <opt>float32re</opt> (for native,
 400       resp. reverse endian) are available as aliases.</p>
 401     </option>
 402
 403     <option>
 404       <p><opt>default-sample-rate=</opt> The default sample frequency.</p>
 405     </option>
 406
 407     <option>
 408       <p><opt>default-sample-channels</opt> The default number of channels.</p>
 409     </option>
 410
 411     <option>
 412       <p><opt>default-channel-map</opt> The default channel map.</p>
 413     </option>
 414
 415   </section>
 416
 417   <section name="Default Fragment Settings">
 418
 419     <p>Some hardware drivers require the hardware playback buffer to
 420     be subdivided into several fragments. It is possible to change
 421     these buffer metrics for machines with high scheduling
 422     latencies. Not all possible values that may be configured here are
 423     available in all hardware. The driver will to find the nearest
 424     setting supported. Modern drivers that support timer-based
 425     scheduling ignore these options.</p>
 426
 427     <option>
 428       <p><opt>default-fragments=</opt> The default number of
 429       fragments. Defaults to 4.</p>
 430     </option>
 431     <option>
 432       <p><opt>default-fragment-size-msec=</opt>The duration of a
 433       single fragment. Defaults to 25ms (i.e. the total buffer is thus
 434       100ms long).</p>
 435     </option>
 436
 437   </section>
 438
 439   <section name="Authors">
 440     <p>The PulseAudio Developers &lt;@PACKAGE_BUGREPORT@&gt;; PulseAudio is available from <url href="@PACKAGE_URL@"/></p>
 441   </section>
 442
 443   <section name="See also">
 444     <p>
 445       <manref name="pulse-client.conf" section="5"/>, <manref name="default.pa" section="5"/>, <manref name="pulseaudio" section="1"/>, <manref name="pacmd" section="1"/>
 446     </p>
 447   </section>
 448
 449 </manpage>