Is it possible to have it such that changing theme doesn't stop the audio? Also buffering issues result in the last tone being held until playback can continue, might be more pleasant if it were just silence.
It's possible. Right now the CSS isn't being applied dynamically so we are actually recreating the player instance every time the theme is changed in this demo.
The second issue is something we are very familiar with. What we think is happening here is that if the track is buffering too slow and the playing progress catches up with the buffer, our player should just stop playing until the track loads. We are playing with the thresholds to make the player pause before it gets to that case. We are pushing a fix for this soon.
Aside from that, looks fantastic!