As I experiment more with GPO and Finale 2006, I have to admit that unpitched percussion is very tricky, especially if you are trying to convert from an older document or switch back and forth between SoftSynth and GPO percussion.

It's not a simple matter of just switching percussion maps -- you also need to change the actual pitches in cases where the SoftSynth percussion mapping doesn't correspond to the GPO percussion mapping. [This is a case where you probably really do need two separate documents, one for Smart Synth playback and one for GPO playback.]

For instance, let's say you are using the General MIDI Orchestral Percussion (Channel 10, Program 49), as outlined on Page A-48 of the Finale documentation.

Some notes line up with GPO's Basic Orch Percussion patch -- for instance, MIDI note 36 (i.e., C2) triggers the "Concert Bass Drum" in General MIDI Orchestral Percussion, and "Bass drum hit right hand" in GPO Basic Orch Percussion. But instruments in the GM Orchestral Percussion set -- "Concert Snare Drum," "Concert Cymbal 1," etc -- don't line up at all with their GPO equivalents. So, for correct GPO playback, you will not only need to change percussion maps, you will need to change, e.g., all instances of D2 and E2 (concert snare drum in GM) to B3 and C4 (snare drum LH and RH in GPO).

What would be the best way to go about doing this? For one-line percussion staves assigned to a single instrument, simple transposition will suffice. But for anything more complicated than that, you need a more flexible tool. TGTools Replace Pitches affects *pitch* classes, so it's no good for changing all instances of D2 to B3, for instance.

- Darcy
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[EMAIL PROTECTED]
Brooklyn, NY



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