10-20-2018, 02:21 AM
"track" here means the data for one of the SPC700's 8 channels. Every song has 8 tracks, though some might just be empty. Editing things like echo is fairly simple because you just change one thing at the start of the song, but transpose has to be done for each track individually -- which means you would probably need to add some bytes -- which would upset all the loop pointers in the song, which is not fun times. I suggested using MML because it figures loop pointers automatically, so it's much easier to make very small edits without worrying about whether you are adding or removing bytes.