Hi Tor,

There is a feature in BiaB that already allows you to use any RealTracks as a double time or half time Realtracks.
In the RealTracks picker, highlight a RealTracks, and then at the top right of the dialog, select normal/half/double or triple time

For a RT at 75, select "half-time" and then the RT will work well at tempo 150

For a RT at 150, select "double-time" and then the RT will work well at tempo 75

For a RT THAT IS A WALTZ 3/4 at 150 , select "triplet-time" and then the RT will work well at tempo 50 for a 4/4 song (to get a 12/8 feel). In this case, each beat of the slow 4/4 is played as a full bar of the fast waltz.


Have Fun!
Peter Gannon
PG Music Inc.