I can see combinatorics relating in the sense that exploring the space of potential compositions can be approached as a ‘combination of’ type problem for differ

I can see combinatorics relating in the sense that exploring the space of potential compositions can be approached as a ‘combination of’ type problem for different elements.. chords as combinations of notes, chord progressions as combinations/orderings of chords, likewise for the order of notes in an arpeggio.. rhythms/grooves can be thought of as like combinations of emphasised beats (emphasis on 2 & the and of 3 vs. emphasis on 1 & the and of 3 for example) at different levels of beat-subdivision.. then the sounds each emphasised beat can take come from a discrete set (kick, snare etc.) so can be thought of as another combination-of type problem. many possibilities. Perhaps this is not what the GP meant though, I’m curious about however it applies. No idea about where linear algebra could fit in, I have yet to see those parallels myself yet but interesting to think how it could relate