I've been doing purely PIC-based sound for a while, internal storage of
PCM (wav stripped of header), 16kHz 8bit mono, output via PIC PWM (8bit =3D
256 levels =3D direct correlation with PWM).  Works fine on an 18F2620 with
20MHz crystal and no PLL, more room to move on a better spec one (now
moved to a 24FJ64).  Interrupt @ 16kHz, send the current sample to the
PWM, then read the next sample from the array in time for the next
interrupt.

I used "010 Editor" to strip the wavs, as it conventiently shows the
various parts of the file structure and lets you select them as chunks.=20
Not sure if there's a similar freeware/gnu program.

Here's one of the threads associated with the project:
http://www.ccsinfo.com/forum/viewtopic.php?t=3D47445

Lee

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