Grass Valley Imagestore 750 v.2.0.1 - Manual (Page 385)

Imagestore 750 User Manual Up-Mix
Miranda Technologies Inc. Page 385
Up-Mix Mode
In this mode, a multi-channel audio signal is synthesized from a stereo audio
input.
From Metadata Mode
In this mode, the control of up-mixing or passthrough is steered by metadata.
This allows automated stereo/surround switching between inputs when the
input source contains same-source audio transitions. Please see page 389 for
more details.