speaker-test - command-line speaker test tone generator for ALSA


   speaker-test [-options]


   speaker-test  generates a tone that can be used to test the speakers of
   a computer.

   speaker-test by default will test the default device. If  you  want  to
   test  another  sound device you will have first to get a list of all of
   the sound cards in your system and the devices  associated  with  those
   cards.  Notice  that  there might be for example, one device for analog
   sound, one for digital sound and one for HDMI sound.  To get  the  list
   of available cards and devices you can run aplay -L.

   $ aplay -L
       Discard all samples (playback) or generate zero samples (capture)
       Intel ICH5, Intel ICH5
       Default Audio Device
       Intel ICH5, Intel ICH5
       Front speakers
       Intel ICH5, Intel ICH5
       4.0 Surround output to Front and Rear speakers

   in  the  above  example,  there are four devices listed: null, default,
   front and surround40. So, if you want to test the last device  you  can
   run  speaker-test  -Dsurround40:ICH5  -c 6. The -c option will indicate
   that the six audio channels in the device have to be tested.


   -c | --channels NUM
          NUM channels in stream

   -D | --device NAME
          PCM device name NAME

   -f | --frequency FREQ
          sine wave of FREQ Hz

   --help Print usage help

   -b | --buffer TIME
          Use buffer size of TIME microseconds.  When 0 is given, use  the
          maximal buffer size.  The default value is 0.

   -p | --period TIME
          Use  period  size  of  TIME  microseconds.  When 0 is given, the
          periods given by -P option is used.  The default value is 0.

   -P | --nperiods PERIODS
          Use number of periods.  The default value is 4.

   -r | --rate RATE
          stream of RATE Hz

   -t | --test pink|sine|wav
          -t pink means use pink noise (default).

          Pink noise is perceptually uniform noise -- that is,  it  sounds
          like  every  frequency at once.  If you can hear any tone it may
          indicate resonances in your speaker system or room.

          -t sine means to use sine wave.

          -t wav means to play WAV  files,  either  pre-defined  files  or
          given via -w option.

          You can pass the number from 1 to 3 as a backward compatibility.

   -l | --nloops COUNT

          Specifies the number of loops.  Zero means to run infinitely.

          When -s option below with a valid channel is given, speaker-test
          will perform always a single-shot without looping.

   -s | --speaker CHANNEL
          Do a single-shot  speaker  test  for  the  given  channel.   The
          channel number starts from 1.  The channel number corresponds to
          left, right,  rear-left,  rear-right,  center,  LFE,  side-left,
          side-right, and so on.

          For  example,  when  1 is passed, it tests the left channel only
          once rather than both channels with looping.

   -w | --wavfile FILE
          Use the given WAV file for the playback instead  of  pre-defined
          WAV files.

   -W | --wavdir DIRECTORY
          Specify  the  directory  containing WAV files for playback.  The
          default path is /usr/share/sounds/alsa.

   -m | --chmap MAP
          Pass the channel map to override.  If the playback in a specific
          channel order or channel positions is required, pass the channel
          position strings to this option.

   -X | --force-frequency
          Allow  supplied  FREQ  to  be  outside  the  default  range   of
          30-8000Hz. A minimum of 1Hz is still enforced.


   Produce stereo sound from one stereo jack:
     speaker-test -Dplug:front -c2

   Produce 4 speaker sound from two stereo jacks:
     speaker-test -Dplug:surround40 -c4

   Produce 5.1 speaker sound from three stereo jacks:
     speaker-test -Dplug:surround51 -c6

   To  send  a  nice  low  75Hz  tone  to the Woofer and then exit without
   touching any other speakers:
     speaker-test -Dplug:surround51 -c6 -s1 -f75

   To do a 2-speaker test using the spdif (coax or optical) output:
     speaker-test -Dplug:spdif -c2

   Play in the order of front-right and front-left from the front PCM
     speaker-test -Dplug:front -c2 -mFR,FL




   The speaker-test program was written by  James  Courtier-Dutton.   Pink
   noise support was added by Nathan Hurst.  Further extensions by Takashi


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