Commodore BASIC 7.0 that came with the Commodore 128 provided commands for playing music notes and setting different instruments. The play function even had a feature that played a note in the background, so that it was possible to play notes simultaneously. While I understand that these features are still quite limited in comparison to machine language IRQ players, I wonder if there exist some non-trivial BASIC V7.0 music demos.
I am aware of music pieces in BASIC using lots of POKEs for the Commodore 64 (for example these ones) and I know that most of them would run on the C128 as well, but I'm explicitly looking for demos that use BASIC V7.0 commands like PLAY, FILTER and ENVELOPE.