If you want to learn how to create chip tunes on the Commodore 64, this e-book may be of help. It’s an expanded manual for the new (2012) and excellent C64 native music tracker SID-Wizard (version 1.2) by Mihaly Horvath. The ebook contains a lot of information from the original SID-Wizard 1.2 manual but have been expanded to explain things so beginners also can start to understand how to make music in this wonderful way. 🙂
There is also a separate PDF with charts and tables only (cheat sheet).
Click the covers to view / download (the links will work when version SID-Wizard 1.2 is released around midnight).