> I have a Sound Blaster card installed on my NetBSD box, and the
> speaker seem working fine.  However, I want to know if the
> microphone also works.  I tried xwave.  It does not record
> anything at all.  I wonder if there is any other way to test the
> audio input function, like a command line such as audioctl?  Or,
> which application can do the test?
First make sure the microphone is the input source and that
the mixer level for it is not 0.  You can do this with mixerctl.
Then you can do
        cat /dev/audio > file.au
and speak into the mic.  Interrupt and play back
        cat file.au > /dev/audio

        -- Lennart