The VOICEMEETER Virtual Audio I/Os support ALL possible Audio Interfaces and allow to connect any audio application, including professional audio workstations with the ASIO driver format.
Supported driver formats:
The MME API or the Windows Multimedia API (also known as WinMM) was the first universal and standardized Windows audio API. This audio interface type is expected to work with any audio device but with latency time possibly around 100ms.
That we call WDM (Windows Driver Model) audio interface in Voicemeeter is handled by WASAPI: the Latest Microsoft Audio Functions to get best audio performances and small latency (< 30ms).
Audio Stream Input/Output (ASIO) is a computer sound card driver protocol for digital audio specified by Steinberg, providing a low-latency and high fidelity interface between a software application and a computer’s sound card.
Kernel Streaming or Direct Kernel streaming API allows low latency audio streaming, since Windows XP, but unfortunately not all audio devices provides this interface.
The WaveRT miniport driver is supported in Windows Vista and later Windows operating systems and can offers good audio performances and small latency (comparable to KS).
Direct-X Audio Interface is used by Video Game and some audio software. The latency is usually comparable to MME.
Understanding VOICEMEETER Virtual I/Os
Virtual I/O are connected to virtual audio devices installed with VOICEMEETER.
Playback devices are used as virtual inputs while recording devices are fed with output B1 and B2 (= B-Busses).
Virtual I/O Driver Connection Overview
The Standard version provides a Virtual Audio Input on Input Channel #3 and a Virtual Audio Output on BUS B (= Output B).