vMix Live Production Software Pro - Manual (Page 91)

vMix User Guide
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The audio meters are also colour coded into 5 distinct bands to make it easy to determine the approximate
audio level at a glance.
Levels are always displayed in dBFS (digital "full scale") where 0 dB equals the maximum possible volume
for a given bit rate.
Peak Levels
So see the maximum peak levels of an audio source at any time, hover the mouse over the audio meters.
The peak level displayed here is calculated as the maximum audio volume (amplitude) received in the past
~2 seconds.
Output Audio Channels
vMix supports eight independent stereo audio mixes or buses called Master (or M), A, B, C, D, E, F and G.