So I recently came up with a design that will allow for twin SID chips to work on the Replica 1. I already have a single SID variant working. The dual model still needs to be tested, however. These cards allow for the SID chip(s) to be controlled via the WOZ monitor as well as Apple Basic. It would be more useful if an external tracker could be used to write music. I was wondering if someone with more software experience could tell me how difficult they think it would be to modify C64 tracker files to work on the memory addresses of the Apple 1. the first SID occupies memory location $B000 and the second is on $8400. I was wondering if it seemed feasible to create an automatic utility for converting the files. I have some experience in software development, but my strenghts lie more in hardware.