WASAPI goes all the way back to Windows Vista.

WASAPI in the form of the BIAB WAS driver comes for the first time with BIAB 2018. If you have good performance with MME or ASIO, you really don't need to use WAS. I recommend you try all three and see how it performs.


BIAB 2026 Win Audiophile. Software: Fender Studio One 8, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Presonus Quantom HD8 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.