PB/DOS Chiptune MML background player

Simple Background MML player
Plays chiptune files formatted to PB/QB MML format.

Best way to get them is to use Midi2MML by NeutronCat:
https://www.smwcentral.net/?p=viewthr...

Pick the best sounding track, as MML supports only one track.
Replace all `r` and `^` with `P`, then drop Octave by 3,
delete all `%`, remove spaces and Line Brake characters,
and finally add `MB` at the beginning of the track.

I'm using AHK script to do this for me, but it can be done
by hand in under 2 minutes.