Hi Phil,
Quote:

If my Bb book shows a song in D then to get BinaB to sound right I drop it 2 semitones to C as I do now, but if I want my wife to play the Alto using the same melody line then I raise the C back up 5 semitones which is the same is raising the D 3 semitones--this gives me the key of F


Yes. You've got it For BIAB to be in tune with you, the written music needs to be dropped 2 semitones. For BIAB to be in tune with your wife, the written music needs to be raised 3 semitones. The difference between the Alto and Tenor is 5 semitones.

Therefore let's say you've got a song in your book that's written in D. You've already created a BIAB file for this and it's been transposed to the key of C so that it works for you. If your wife wants to use the same file, when she plays the music in the key of D as written, the sound will be the key of F (3 semitones up from the written music). Since the BIAB file is tuned to the tenor though (which was dropped 2 semitones), the file must be transposed (a) back up 2 semitones to get back to the key that's written in the book and then (b) up 3 semitones to compensate for the Eb pitch; a total of 5 semitones.

All the best,
Noel

Last edited by Noel96; 01/22/12 04:52 PM.
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