>> Is it possible to use the sequencer stuff in the OSS sound driver
>> to let the sound card play a sine wave of a given frequency?
>In theory it's possible to play sine waves using the OPL3 FM synth chip
>available on most older (ISA) soundcards. However this is very inpractical
>way.
>
>A much easier way is using /dev/dsp. You only need to construct few cycles
>of sine wave at given frequency to a buffer. Then just keep writing this
>buffer to /dev/dsp as many times as you need. In fact it may even be
>possible that somebody has already written this kind of app (look at
>ftp://sunsite.unc.edu/pub/Linux/apps/sound).
See
http://metalab.unc.edu/pub/Linux/apps/sound/dtmf-dial-0.2.tar.gz
It combines two sine waves and outputs to /dev/dsp. You are
welcome to hack on it. Internally it has the function to
produce sine waves at any integer frequency and sampling rate.
Itai
