Secondary Mix Matrix - Extron electronics DMP 64 User Manual

Secondary Mix Matrix

The DSP architecture contains a secondary mix matrix that connects the
mic/line inputs and virtual bus return signals to the virtual bus sends. The
DSP Configurator GUI provides control of the secondary mix matrix, used to set
levels from the post-processing input line and virtual bus return signals to the
virtual bus send busses. Each of the six mic/line and four virtual return inputs is
connected to a mix-point for virtual bus A-D. Each mix-point is muted and set
to 0.0 dB (unity gain) by default. In general, mix levels are set relative to each
other, achieving a desired blend of input signals at an optimal level close to, but
not exceeding 0 dBFS at the output volume level meter.
The secondary mix matrix contains a section (see figure 32 below) that allows
virtual bus returns to be routed back to the secondary matrix to allow further
processing using an additional virtual bus processing block. To prevent
feedback loops, a virtual channel is prevented from being routed back to itself
by eliminating the mix-point that would allow that to occur.
In situations requiring extra processing, the virtual bus return output is routed
back to the secondary mix matrix, virtual bus send, which then routes the signal
back to a processing signal chain other than the one it was routed from.
Inputs
1 Mic/Line Input 1
GAIN FLT
2 Mic/Line Input 2
GAIN
FLT
3 Mic/Line Input 3
GAIN
FLT
4 Mic/Line Input 4
GAIN FLT
5 Mic/Line Input 5
GAIN
FLT
6 Mic/Line Input 6
GAIN FLT
Virtual Bus Return
A FLT
B
FLT
C
FLT
D
FLT
Figure 32.
FBS DYN DYN DLY GAIN
DUCK
GAIN
FBS DYN DYN DLY DUCK
GAIN
FBS DYN DYN DLY DUCK
FBS DYN DYN DLY GAIN
DUCK
GAIN
FBS DYN DYN DLY DUCK
FBS DYN DYN DLY GAIN
DUCK
DYN LOUD GAIN
DYN LOUD GAIN
DYN LOUD GAIN
DYN LOUD GAIN
Secondary Mix Matrix
TRIM DLY FLT
LOUD
TRIM DLY FLT
LOUD
TRIM DLY FLT
LOUD
TRIM DLY FLT
LOUD
A B
Secondary Mix
Virtual Bus Send
Matrix
1
DYN VOL
2
DYN VOL
3
DYN VOL
4
DYN VOL
Outputs
Virtual Bus Send Mix-points
(from Mic/Line Inputs)
Virtual Bus Send Mix-points
(from Virtual Bus Returns)
C D
DMP 64 • Operation 43