vMix Live Production Software Pro - Manual (Page 37)

vMix User Guide
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Audio Outputs allows up to eight independently controllable audio outputs (excluding Headphones output)
If both Master Output and Headphones are set to the same device, Headphones will take priority.
Master Output
Select the output to send the Master audio mix to. This is the default audio mix
used for streaming, recording and external output.
Headphones
Select the output to send the Headphones audio mix to.
This mix is the same as Master Output except when Solo is enabled on an input.
When Solo is enabled on an input only that input will be heard.
A, B, C, D, E, F, G
These are optionally auxiliary audio buses that can be configured as an independent mix from the Audio
Mixer .
For additional information about the audio buses feature, see the Audio Mixer documentation.
Audio Channels
Many sound cards provide 3 or more stereo outputs from a single device.
These are typically used to output surround sound, but can be used to output up to three independent
stereo audio mixes in vMix.
1 + 2 The most common setting for standard stereo audio outputs
3 + 4 This will send a stereo mix out over the output usually used for Center-Subwoofer