It's not in Biab itself, it's the plugin. Read what the quote from Wikipedia says about tempo and timing. ARA allows that info to come over to the DAW immediately not tick by tick as the song is playing as is the case in a standard plugin. That means the whole tempo map question is solved among other things. IF ARA can be made to work in the Biab plugin and IF it doesn't cost too much for licensing or whatever is required to use it.

This is yet another thing that is either a big shrug or vital depending on the user. I still think the vast majority of users are creating standard 4/4 or 3/4 songs at a constant tempo so it's a big shrug for them. For others with varying tempos and even different time sigs in the same song this could be a big deal because my understanding is with ARA in a compatible plugin and DAW that gets mapped up front.

Bob

Biab/RB latest build, Win 11 Pro, Ryzen 5 5600 G, 512 Gig SSD, 16 Gigs Ram, Steinberg UR22 MkII, Roland Sonic Cell, Kurzweil PC3, Hammond SK1, Korg PA3XPro, Garritan JABB, Hypercanvas, Sampletank 3, more.