ps...just curious and not knocking it but why the need for a drum machine ??
Well... In my not-thinking-this-out-too-well mind, I thought it would be easier to control the tempo from a few buttons on the drum machine than adjusting some setting on the DAW or BIAB itself. IN retrospect, yes, the drum machine is probably unnecessary.
I like to play along with practice tracks I create in BIAB and I wanted an "easy" way to adjust the playback tempo.