Bring up the Conductor
Select the "Enable control by Midi keyboard"
Push the "Show Midi Notes" button

If the edrums can send a steady beat o Eb4 then BIAB can sync to it.
Otherwise, skip it. Tap tempo isn't reliable enough to track live play.

Instead program some pads to send decrease / increase tempo changes, and the drummer can hit these to speed up or slow tempo down a bit.