Playing two melodies at once sounds bad

[darzu]

On a chromebook and on a circuitplayground: https://youtu.be/Kv79Qf6Mk5c

As someone not familiar with the nuances of music playback, this behavior was surprising to me. I expected to hear both melodies as if I were playing them on two different speakers.

We should set expectations and communicate with the user if multiple melodies at once is not supported.