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