I was not expecting anyone to go for such a complex instrument but you did! For that i respect your bravery haha
I'm not sure if this was done on purpose but the only feedback i can give is that the inputs should defo be realtime, Instead of having to hold a button and then see which tubes went down after you blow the instrument, the tubes should probably just go down right when you hold down a button. This change would make a day and night difference in the player's ability to play something on the VR Trumpet! But other than that, Phenomenal Job!