The way you have this written, Bb7/13, indicates you want a Bb7 chord with the 13th as the bass. So you would enter that as Bb7/G. If this is not the chord then your choices are Bb7 or Bb13. I do not believe you can use the chord Bb7add13 in BiaB with out using a sequencer and adding the G, but I’m not at my music computer to check that out.

I hope this helps.

Last edited by MarioD; 11/07/10 06:58 AM.
Whenever I get something stuck in the back of my throat, I dislodge it by drinking a beer.
It's called the Heineken Maneuver.

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware