What is WASAPI?

WASAPI stands for Windows Audio Session API, an audio system used by the Microsoft Windows operating system to manage sound playback and recording. It allows applications to communicate with audio devices such as speakers, headphones, and microphones.

WASAPI provides two main operating modes: shared mode and exclusive mode. In shared mode, multiple applications can send audio to the system at the same time, and the operating system mixes the sounds together. In exclusive mode, a single application can take direct control of the audio device, which can reduce latency and improve audio quality.

This system is commonly used for media playback, streaming, and general audio applications on Windows computers. Exclusive mode can also be useful for music production or high-quality audio playback where lower latency and accurate sound reproduction are important.

Many audio applications and digital audio workstations such as Ableton Live, FL Studio, and Pro Tools can use WASAPI on systems running Microsoft Windows to communicate with audio hardware for recording and playback.