I'm getting very close to it functioning just as it should.
It's reading serial data and detecting a change in its output signal.
Now, this patch has four audio tracks. I would like the audio tracks to play in sequence, looping back to the first when the last one ends, unless the serial data switch opens, in which case I would like the audio track to jump to the next track, then continue to play in sequence. I'm pretty sure I'm nearly there, just a tiny bit more help would be great!