Bring back MODs (or MIDIs)
Ahh AxelF, the joy of playing MODs on your Amiga or PC (helped make Amiga demos to be very cool). The Open Music Registry has a licence which is similar to GPL but for music. They distribute their files not in MIDI or MOD format but in MP3 and Ogg Vorbis - listen only executables. May-be a new format for listening and modifying is required.