Traditional (not electric) piano have very inflexible tuning options. Human voice, violin, trombone, ... much better in this regard. Even if you not thinking a

Traditional (not electric) piano have very inflexible tuning options. Human voice, violin, trombone, ... much better in this regard. Even if you not thinking about "exotic"(at least for westerners) scales, but simple&clear western accords like just intonation. https://en.wikipedia.org/wiki/Just_intonation#Singing_and_scale-free_instruments https://en.wikipedia.org/wiki/Just_intonation#Singing_and_sc... edit - music recommendation: https://ziaspace.bandcamp.com/album/drum-n-space https://ziaspace.bandcamp.com/album/drum-n-space