Hi Noel

Thanks for such a prompt reply

At the risk of seeming even more stupid I will put what I think that means

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

If thats correct I can create a table of key transpositions to give her which will enable her to use BinaB when I am not there

Is that right

Tx

A very humble Phil