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SPEAKER-TEST(1) 								  SPEAKER-TEST(1)

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

SYNOPSIS
       speaker-test [-options]

DESCRIPTION
       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 avail-
       able cards and devices you can run aplay -L.

       $ aplay -L
       null
	   Discard all samples (playback) or generate zero samples (capture)
       default:CARD=ICH5
	   Intel ICH5, Intel ICH5
	   Default Audio Device
       front:CARD=ICH5,DEV=0
	   Intel ICH5, Intel ICH5
	   Front speakers
       surround40:CARD=ICH5,DEV=0
	   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.

OPTIONS
       -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  sys-
	      tem 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, cen-
	      ter, 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
	      Use the given WAV file for the playback instead of pre-defined WAV files.

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

       -m | --chmap
	      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.

USAGE EXAMPLES
       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 speak-
       ers:
	 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

SEE ALSO
       aplay(1)

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

speaker-test				 April 2nd, 2011			  SPEAKER-TEST(1)
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