So he re is my take.

I would like to take a tune set in the general concert key, e.g. C.

For alto or bari sax, this needs a chord and lead sheet in the key of A to display the correct notes for an Eb (-3 semitones) to play in proper concert pitch (C in this example). However, for the output notes from the midi to sound in tune with the concert key now requires a +9 semitone transpose. As of now, you need to transpose the concert key song file -3 semitones so the chords and notes are correct for the Eb instrument, and then use Options...Preferences...Transpose to set a +9 output note transpose to sound the correct concert pitch, e.g. playing an Eb instrument with the BiaB backing.

Two issues: This output transposition change is not stored with the song (File save), and it is applied to everything, not just a single track/instrument.

One: build a function/macro to accomplish these transposes, with one input (what semitone transpose do you want?)

Two: Allow this to be applied on a track-by-track basis (one track may have a Bb instrument, one an Eb instrument, and some are concert-tune instruments (like strings).

Thanks for your consideration.

Three: Save this info with the song file,