[ale] Generating sound

[Chuck Huber]

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Okay, admittedly I'm new to using sound cards beyond playing alert sounds and
hooking up speakers for video/audio playback.

I need to generate a 1kHz tone and
   a) emit this through a sound card to speakers
   and b) convert this to an MP3 file.
I can write a quick C program that will generate integer values in a sinusoidal
fashion.  However, getting these values to a sound card is a mystery to me at
this point.  Perhaps I'm thinking too low of a level - maybe the sound card will
accept a command to generate a tone at a certain frequency.  Don't know.

Additionally, I'll need to capture the A/D input from the line input jack.  I
*don't* need to do both at the same time.

If anyone could point me in a direction to get started, it'd be greatly appreciated.

Thanks,
    - Chuck

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