I'm so sorry Peter I should have mentioned that I have upgraded from V12 and am now up to date and on 2012.5. I have the Mega PAk version

After a little bit of searching last night I found a thread where Philsaxophone was having a similar problem (in the BIAB Windows Forum). He had a Bb Fakebook and was wanting to enter the chords from this into BIAB and play his Tenor while the Rhythm section played in concert.

The solution was given very succinctly by Matt Finley and I hope he doesn't mind me repeating it here:

start quote"
1. Select the correct key signature for the tune as written in the Bb fakebook.

2. Enter the tune as written in the Bb fakebook.

3. Change the key signature one full step (or two-half-steps) lower (examples: E goes to D; Eb goes to Db) and say Yes to the question, OK to transpose worksheet.

4. The piano, guitar, and any other non-transposing instrument will play the song this way if you print it.

5. Now, to see it as a Bb instrument wants it, go to Opt, Preferences, Notation. In the pulldown for Transposition Options, select Clarinet +2.

6. Now you will hear the song in the correct key for piano etc. but see it in the correct key for a Bb instrument.

7. The transposition preference in BIAB is not saved with the song, so remember to go back after saving the song and set it to Concert pitch. It's also a good idea to save the song in a separate folder, or give it a different name such as Mysong Bb, so that you know that it was intended to be played with a transposition in effect. Otherwise, someday you will load that song, print it for a pianist, and get a surprise when it's played in the 'wrong' key. When you load a song, there is a brief yellow box flashing in the upper left corner to warn you a transposition is in effect.

--------------------"end quote

This is the same solution that I finally arrived at and described a few posts ago. (of course I selected Tenor Sax as the transposed instrument but the principal is the same).

What was totally confusing me was that after doing all the above, if the Notation view is entered and the Piano part selected the Key Signature is not Concert as expected but the transposed key signature; the chords above the stave are also the transposed ones. I'm not sure if this is working as designed but I believe it would make more sense if the Piano part was always displayed in concert. The piano is definitely playing back in concert but not whats written in the notation view.

It would be so helpful if a PG Staff member could confirm this operation

So fortunately I don't think you do need to enter chords in Concert if your playing a transposing instrument, BIAB can do the transposition for you but you need to be wary of whats being presented in Notation view.

Sorry for the long post, at least I think I understand whats going on now and I hope its helped others as well.

Malcolm