Anything other than SGU, MGU, or MGX are legacy file extensions that harken back to the early days of BIAB when there were only a handful of MIDI-only styles (most of them start with ZZ). So MG1 represents a song that used the ZZJazz style. One of the other numbers is for the ZZBossa style, etc. It's all documented in the user manual. Once PGMusic started putting out a lot more styles, they changed to MGU and SGU (U for user). The SGU is strictly an accompaniment file that does not use the Melody or Soloist track. The MGU file has data on the Melody and/or Soloist tracks.


John

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