03-28-2013
(This could be homework.)
I am not sure i am understanding you correctly but I assume you want the sounds to be like morse code...
This will generate a single tone.
https://www.unix.com/shell-programmin...ator-demo.html
It is up to you to work out morse code with it which is not difficult...
Alternatively if it as voice you want the look at "cat" and use it to record raw voice data directly to disk, as <number>.raw using a laptop's internal mic for ease of use...
This assumes that you have /dev/dsp as a device.
Not sure why you need <number>.wav but if that is a requirement then look at SOX for doing all of the above...
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LEARN ABOUT NETBSD
audiocfg
AUDIOCFG(1) BSD General Commands Manual AUDIOCFG(1)
NAME
audiocfg -- configure default audio device
SYNOPSIS
audiocfg list
audiocfg default index
audiocfg test index
DESCRIPTION
The audiocfg utility helps maintaining the audio and mixer device symlinks.
Run with ``list'', it lists the available audio devices and shows the currently selected default audio device. Called with ``test'', it
plays a tone of 2 seconds for each channel of the device with the index index. Called with ``default'', it sets the default audio device to
the one with the index index.
audiocfg needs access to /dev/drvctl and write access to /dev (when used with ``default'') to work.
FILES
/dev/audio Symlink to default audio device.
/dev/audio[0-9]*
Available audio devices.
/dev/audioctl
Symlink to default audio control device.
/dev/audioctl[0-9]*
Available audio control devices.
/dev/drvctl
Used for finding the corresponding audio driver to an audio device.
/dev/mixer Symlink to default mixer device.
/dev/mixer[0-9]*
Available mixer devices.
/dev/sound Symlink to default audio device (for the difference to /dev/audio, see audio(4)).
/dev/sound[0-9]*
Available audio devices.
SEE ALSO
audioplay(1), audiorecord(1), audio(4), drvctl(8)
BSD
September 1, 2010 BSD