Now the AY player is done I've started having a look through my other WIP projects to work on. I've decided to give the Sid Remix tool a proper look and see how it goes. Here's current progress:
Currently you can run 3 source songs in sync (with timing adjustments) and pipe their channels and filters out to up to 3 sid chips in any order. The next thing I'm looking at is the fx busses, which will allow you to start manipulating the data as it passes from input to output.
Song credits (from top to bottom on the left) : "Shorty" by Dane , "Lightforce" by Rob Hubbard and "Crazy Comets" also by Rob. I'm cherry picking channels from all 3 songs and piping them out to 2 sid chips on the right.