SPEAKER\-TEST
Section: User Commands (1)Updated: 20 September 2004
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NAME
speaker-test - command-line speaker test tone generator for ALSASYNOPSIS
speaker-test [-options]DESCRIPTION
speaker-test generates a tone that can be used to test the speakers of a computer.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 ERIODS
-
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
-
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.
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 speakers:
-
speaker-test -Dplug:surround51 -c6 -s1 -f75
AUTHOR
The speaker-test program was written by James Courtier-Dutton. Pink noise support was added by Nathan Hurst. Further extensions by Takashi Iwai.
