Exactly how do you imagine that PGMusic can anticipate and program into Biab a melody that you possibly have not even conceived yet? Then in turn, do the same for every user of the Biab program?

Even with RealTracks, you have to enter the key, tempo and chords as well as structure the song which includes developing the melody.

As previously noted by others, Biab can develop a melody over your song structure in whatever key, tempo and chord progression you've created. They've also provided an audio channel for you (or someone who can if you can't) to include whatever custom track you desire. It can be voice, instrument, entire band or any audio that has been recorded in the correct format?

There is no single correct melody to play over a backing track regardless if it is created in Biab or played live. The melodic choices are infinite.

BIAB 2025:RB 2025, Latest builds: Dell Optiplex 7040 Desktop; Windows-10-64 bit, Intel Core i7-6700 3.4GHz CPU and 16 GB Ram Memory.