Sorry; I had assumed you would first Google the definitions and wanted more practical advice. A little more:

WAS was defined above and API just means application programming interface. WASAPI is WAS for short.

MME is much older than WAS and I have always used MME.

ASIO is a standard that vendors use to develop drivers for their own equipment. It should work fine unless you also have a DAW or other Windows digital audio program open at the same time as BIAB. I knew you had Studio One.

You can try switching drivers, but you will probably encounter timing issues between audio and MIDI that must be adjusted in BIAB.


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.