Hi Armand,
Moutipass gave you the answer to your problem. That is generate the tracks then drag and drop them into Reaper. Once in Reaper they do not generate and will play instantly. Note that I always drag and drop BiaB tracks into my DAW and finish my songs in my DAW.

Doing the above also eliminate a slow generation, especially on an older slower computer.

I hope this helps and good luck.


Life is short so make sure you spend as much time as possible on the Internet arguing with strangers.

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware