This morning I installed a music player that I am unfamiliar with, and decided that the first thing I should listen to is Angine de Poitrine Vol. 1 and Vol. II since I hadn’t listened to them in a while. And then I found, by coincidence that they played the Montreal Jazz Festival last Saturday (June 27th, 2026) and broke the attendance record set by Stevie Wonder in 2009.
Any fretless instrument (bass, gtr, violin, viola, cello) is microtonal. Trombones as well.
And yet they’re never used like that, so what’s your point?
Also human voice.