SPEAKER-TEST(1) General Commands Manual 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
available 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 peri-
ods 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|st2095|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 st2095 means use bandlimited pink noise at -18.5dB AES FS,
generated according to SMPTE ST-2095:1-2015. In addition to
speaker localization it may be used for system calibration, for
example 85dB for thater drivers, with an extra +10dB for sub-
woofers. Per the spec, it is intended "to be used in calibrating
the sound pressure level and electroacoustic response of a cinema
B-chain system." Note that sampling rates less than 48KHz are
outside the scope of the spec, and an attempt will be made to
construct a reduced rate filter.
-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 de-
fault 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.
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 touch-
ing 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
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. SMPTE ST-2095:1 band-limited pink noise added by Rick Sayre.
speaker-test April 2nd, 2011 SPEAKER-TEST(1)
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