Timbre
Reflection
I had two ideas. One was a bit silly and probably done before, but it would be a synth that lets you choose the instrument for each note. I don't think it would useful per se, but it would be fun to play with. My other idea would be this cube that you could interact with, and every side plays the same melody with different instrument. The volume would somehow be mapped so that each sample is playing with a volume proportional to how much of the cube face you can see. So if you rotate the cube and you can see 3 faces, then you'll hear 3 samples at equal volume. If you can only see 1 face, you'd only hear one sample at its highest volume. Maybe the environment would change accordingly as well.