Simplest way is to drag tracks (individual or Master) out of BIAB and drop them as indiviual tracks into Reaper. No need for RealBand, no need to export and import.

Just be sure when you save your Reaper file you check the box which says "move all tracks to Project Directory".


BIAB – 2025, Reaper (current), i7-12700F Processor, 32GB DDR4-3200MHz RAM, 1TB WD Black NVMe SSD, 2TB WDC Blue SSD, 1TB WD Blue, 2 TB SK NVMe, 6 TB External, Motu Audio Express 6x6