Junger Audio C8491 - Compact Card - Manual (Page 16)

digital audio
modular
processing system
C8000
3G/HD/SD-SDI – DSP 4/8/16 audio channels
C8491
page 16/21
Failover D
[Prinmary / Secondary / AUTO]
The second fail over circuit can take the downmix as a failover source
in case the input signal fails. But it may simply put the downmix
permanently through (Mode switch is set to Secondary).
The other parameters are already described in the DSP 1B section.
Surround Detect
Switch [AUTO / FIX Surround / FIX Upmix]
You may turn on or off the upmix permanently or involve the surround
detector for auto switching.
Detection [Center / Surround / Center or Surround / Signal loss]
here you set up which signals must be observed to detect a surround
source.
Fail Threshold [-80 … -70 … -40 dBFS]
if the the RMS weighted input level drops below this value a fail signal
will be generated.
Fail Wait [0.0 … 10.0 seconds]
time until the fail condition becomes false after signal returns above
fail threshold.
Downmix
Out Gain [-20 … 0 … 20 dB]
Center Mix Level [-12.0 … -3.0 … 0.0 dB]
Surround Mix Level [-12.0 … -3.0 … 0.0 dB]
Upmix
Enable [off / on]
Profile [Balanced / Front Projection]
Upmix Mode [Stereo / Mono]
tells the algorithm if the input signal may have correlated components
or not.
Process [slow / mid / fast]
reaction time of the upmix processes. For news, sports, shows with
permanently changing content (e.g. applause) setting "fast" is
recommended while mid / slow is recommended for music, movies.
Processing Time [3 … 100 ms]
the Look-Ahead Delay has great influence on the quality of the upmix
process in regard to the latency of the process. The more time you
have to analyze the stereo signal the better the result for the upmix
signal will be. Depending on the system latency requirements (ingest
vs. live broadcast) you may change the processing time accordingly.
Center Divergance [0.0 … 0.5 … 1.0]
the upmix process assembles a center signal from the input stereo.
It may either be fed to the center channel only (0.0) or spread
between L/C/R (1.0). The effect will be a wider presentation of center
signals in a surround sound image.