MVSTracker is a program designed to let you create FM music with a tracker style interface. It also allows for ADPCM-A sample encoding (though not quite accurate; see ADPCM codecs for more information). According to an interview with Jeff Kurtz, the Z80 driver does not work on hardware.
The original version was created by Ivan Mackintosh, using a YM and Z80 emulator DLL by Thor, and YM emulation from MAME.
MVSTracker was later modified by Pascal Bosquet and Kaneda, primarily to add Mega Drive/Genesis support.