Band-in-a-Box master tracks are rendered as a stereo mix. There is a setting to include a one or two bar MIDI generated count-in before the music starts. Most of the RealDrum audio tracks include a one or two bar audio count-in. So obtaining a count-in should not be an issue.

To have a metronome click on one channel and the instruments on the other channel the master track would need to be rendered as dual mono. Band-in-a-Box does not have the capability to render a master track in dual mono.

Audacity can convert a stereo track into mono, create a click track and combine two mono tracks into a dual mono track but all of that is additional work after the backing tracks are created and rendered.

If you're willing to give up the discreet click track you would not need to use Audacity and all of those additional steps. Band-in-a-Box provides a count-in and you can play or sing along with the music.

Jim Fogle - 2025 BiaB (Build 1128) RB (Build 5) - Ultra+ PAK
DAWs: Cakewalk by BandLab (CbB) - Standalone: Zoom MRS-8
Laptop: i3 Win 10, 8GB ram 500GB HDD
Desktop: i7 Win 11, 12GB ram 256GB SSD, 4 TB HDD
Music at: https://fogle622.wix.com/fogle622-audio-home