Dnj. Re the offending midi file (handclaps)

It is worth trying the following.
Load Midi File into PC Suggest Cakewalk. On Drum Track on the BANK Column type in 16525. This is the Bank number that is sent out by the PSR when a midi file is saved.
Also if your midi file has a Track 9. This is often a percussion track on certain keyboards and could contain you offending handclaps, if so delete this track.
Work on a copy of the midi file not the original in case you need to go back to square one.

Just thought this might help.

Graham UK

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