@Mike

The trick is: you make a midifile in Realband (max two chords per bar) in 5/4 (example)

-Set the meter, 5/4
-Type in the chords, max 2chords per bar
-Make a piano track where you play the chords at the start of each bar or chord change (in5/4, of course). In root position, including sevenths and extensions, just as you wrote them. Band in a Box needs that to interpret your bass part and other parts you may add. It’s crucial that they land perfectly on time, quantize if necessary.
-Record a bass line on ch. 2
-Add drums on ch. 10
-Add markers A and B
- Go to Edit, Midi, change length of midi (be sure to select all tracks first) and shrink the 5/4 into 4/4, this means new length is 75%
-Change meter to 4/4 and check if the whole track is in “4/4” now. This means that every bar a new 5/4 bar starts.
-Go to Edit, Midi, Rechannel all...
-Save as midi

Now you open band in a box, style wizard, import midi, tick “jazz” and all the rest will already be correct, mostly.

Give it an 8bit name (no more than 8 characters).

Add this style to any song with max two chords per bar. Check how everything looks like 4/4 but plays 5/4 quite nicely.

There is much more to style making, and it can be really frustrating at times, It’s time consuming, but it’s definitely worth it.

Njoy!

P.S. there should be ways to do this with Realtracks, but you’d have to play all possible chords on all possible instruments... not an easy thing

Biab, Kontakt, Sampletank and lots of nice libraries, from Fluffy audio to Abbey Road drums.
Check out these great contemporary Jazz Styles: www.jazzstylezz.com