TIATracker is a tool for making Atari VCS music on the PC and a new
sound routine for the VCS. It features ADSR envelopes, up to 7 melodic
and 15 percussion instruments, customizable pitch guides for optimizing
the number of in-tune notes, a size-optimized and configurable replayer
routine and much more.

WWW: https://bitbucket.org/kylearan/tiatracker/src/master/