The C64 Digi

From the archives of C=Hacking (The Fridge), I've dugged out a couple of interesting SID references, like a complete reference on digital sampling and the C64, including: general theory, SID hardware description, and methods of playback (changing $d418, pulse width modulation, and various tricks). Numerous code examples are given, along with a program that does true 8-bit playback at 16KHz -- it requires a SuperCPU, but it is most impressive, and chances are awfully good that you've never heard a digi like this out of SID before.

C=Hacking Issue #20