OK, rharv gave one of the settings in Opt., Preferences, RealTracks that should be used on a slower machine with problems running BIAB version 2013. The other two are right under it:

Uncheck "High Quality ..."
Check "Use +/- RealTracks"


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.