speaker-test(1) [suse man page]

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.

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 indi-
	      cate 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.

speaker-test							 20 September 2004						   SPEAKER-TEST(1)

Check Out this Related Man Page

AUDIO(3)						     Library Functions Manual							  AUDIO(3)

NAME

       audio - digital audio input and output

SYNOPSIS

       bind -a #A /dev

       /dev/audio
       /dev/volume

DESCRIPTION

       The audio device serves a one-level directory, giving access to the stereo audio ports.	Audio is the data file, which can be read or writ-
       ten to use the port.  Audio data is a sequence of stereo samples, left sample first.  Each sample is a 16 bit little-endian  two's  comple-
       ment integer; the default sampling rate is 44.1 kHz.  Some implementations only support audio output and return a zero length when read.

       Volume  is  the control file associated with the audio port.  Each input and output source has an associated stereo volume control, ranging
       from 0 (quiet) to 100 (loud).  In addition, there are controls for the sampling rate of the D/A and A/D converters and for  any	tone  con-
       trols.  Reads return lines of the form

	      source in left value right value out left value right value

       possibly  abbreviated  if  the  values  are  shared or non-existent.  For example, if all of the values are shared, the form degenerates to
       `source value'.	Valid sources depend on the particular audio device, though all devices have a audio stereo  source,  which  controls  the
       output volume from the D/A converter connected to audio.

       Writes  accept the same format with same abbreviations.	Writing the string reset sets all of the attributes to their default value, and if
       no attribute is supplied, audio is assumed.

       The Sound Blaster 16 (or MCD) is half-duplex and has the following controls.

       audio out
	      Data written to audio.

       synth in out
	      MIDI synthesizer.

       cd in out
	      CD player.

       line in out
	      Line-level input.

       mic in out
	      Monaural microphone input.

       speaker in out
	      Monaural internal speaker connection.

       treb out
	      Stereo treble tone control.  Values less than 50 decrease the treble, those greater increase it.

       bass out
	      Stereo bass tone control.

       speed in out
	      Sampling rate for the D/A and A/D converters, expressed in Hz.  Defaults to 44100.

       Indigo audio is full-duplex and has the following controls.

       audio out
	      Data written to audio.

       line in out
	      Line-level input.

       mic in out
	      Microphone input.

       aes in out
	      Digital input.

       Nextstation audio is output only and has the following controls.

       audio  Data written to audio.

       deemp  A value of zero turns off the stereo de-emphasis filter, any other value turns it on.

SOURCE

       /sys/src/9/*/devaudio.c

																	  AUDIO(3)

Linux and UNIX Man Pages

speaker-test(1) [suse man page]

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