Junger Audio D*AP8 Digital Audio Processor - Manual (Page 59)

D*AP8
57
Setup GUI – AUDIO PROCESSOR – Upmix (5.1 + 2) & 2ch Fail Over
Junger Audio provides a new 5.1 upmix
algorithm for upmixing stereo or even mono
sources to multichannel surround sound
while remaining acoustically downmix
compatible. This is a real-time process which
does a frequency analysis of the input signal.
As known from the mathematical theory, the
longer the time for such an analysis the better
the result. But this will introduce more delay
for the audio path, compared to the video.
This delay, if acceptable in general, may be
compensated by the video delay of the SDI
embedder.
Please note that presets created with earlier
firmware version are not compatible with the
new upmix algorithm!
You may take the upmix source signal from
either the surround Left/Right input (in case it
provides stereo PCM instead of surround
L/R) or from pre-selectable inputs (2L/2R or
AUX).
The Surround Detect circuit monitors the
input channels to decide if the surround
signal has disappeared in order to do an
automatic upmix if desired. But the upmix
may also be forced by an event of the system
that loads a preset configuration, that turns
the upmix permanently on.
Downmix
Out Gain (dB) [-20.0 … 20.0]
output gain of the downmix signal
Center Mix [0.0 … -12.0]
level (dB)
Surround Mix [0.0 … -12.0]
Level (dB)
Fail Over Upmix switch that provides the upmix block with an input signal for upmix or
pass through if the source is not intended do be used for upmixing.
Mode The switch may be permanently [FIX]
connected with either the 1L/1R, 2L/2R or
AUX input but it may also perform an [AUTO]
switch over from 1L/1R to AUX or 1L/1R to
2L/2R if the first signal fails.
Both options may also turn the upmix off
[no Upmix]. I.e. the fail over signal will not be
upmixed.
Dual Mono [OFF / AUTO]
A detector looks for the input signal. If it is a left [L] or right [R] only it
converts that signal either to [L/L] or [R/R].