ÿþMIDI files played back using FM sound.

This function requires the sound bios, so if you're emulating you'll need the sound.rom file. This also means that emulating in Anex86 will not work, because Anex86 does not emulate the sound bios.

Invoke it from the command line with the switches /I51 to /I56. The different switches allocate the available sound channels in different ways.

00             /I51   FMx1 0PSG(rhythm)
00             /I52   FMx2 0PSG(rhythm)
00             /I53   FMx3 0PSG(rhythm)
00             /I54   FMx3 0PSG(melody)x1  PSG(rhythm)
           /I5 or /I55   FMx3 0PSG(melody)x2  PSG(rhythm)
00             /I56   FMx3 0PSG(melody)x3

In most cases /I55 or /I56 would be best I think, but it really depends on how the song is composed.

You can also do beep playback using from 1-8 voices with the switches /I81 to /I88.
 
So from the command line, type, for example,
MIMPIV4 /I86 whatever.mid

The best way to use this with MU is by predefining the mimpi switch in a batch file such as AUTOEXEC.BAT.
SET MIMPI_SW=/I55