I think is it likely caused by BIAB loading RealTracks into RAM as they regenerate. Your DAW only needs to run audio files from disk (unless you are doing non-destructive edits).

Maybe bring up the Windows Task Manager and monitor your RAM as you run plugins in BIAB to see what happens.

How much RAM is in your system? If you are using Windows 32-bit, you only have around 3.2 GB to start with. If you have Windows 64-bit AND BIAB 2015, the new version supports using additional RAM for plugins using their special version of JBridge. So tell us more about your system specs.



BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.