I see that RB calls BIAB to generate the Realtracks and passes back audio, (and midi if you ask for it). So they aren't really Realtracks. I made a bad assumption watching the video. I'll still stick with BAIB if I want to adjust tempo live.

I can use Midi Maestro to send taps to BIAB as midi note on/off. Midi Maestro is very good about following a tap to gradually increase or decrease tempo and not suddenly jumping like tap direct in BAIB. I can "conduct" fine from Midi Maestro, using it to send the midi commands to BAIB conductor to change tempo or jump around. BAIB does glitch at times doing this, but it glitches directly without midi maestro running it.

RB just isn't there - yet.

The 2011 realtracks are great!