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 user interface
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 sends. Each of the six mic/line
and four virtual return inputs connect to a mix-point for virtual bus A through 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 44) allowing 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 FILT FBS
2 Mic/Line Input 2
GAIN
FILT FBS
3 Mic/Line Input 3
GAIN
FILT FBS
4 Mic/Line Input 4
GAIN FILT FBS
5 Mic/Line Input 5
GAIN
FILT FBS
6 Mic/Line Input 6
GAIN FILT FBS
Virtual Bus Return A
FILT DYN
B
FILT DYN
C
FILT DYN
D FILT DYN
Figure 44.
DYN DYN DLY DUCK GAIN
GAIN
DYN DYN DLY DUCK
GAIN
DYN DYN DLY DUCK
DYN DYN DLY GAIN
DUCK
GAIN
DYN DYN DLY DUCK
DYN DYN DLY DUCK GAIN
LOUD GAIN
LOUD GAIN
GAIN
LOUD
GAIN
LOUD
Secondary Mix
Matrix
Secondary Mix Matrix
1
TRIM LOUD DLY FILT DYN VOL
2
TRIM DLY FILT DYN VOL
LOUD
3
TRIM DLY FILT DYN VOL
LOUD
4
TRIM DLY FILT DYN VOL
LOUD
Outputs
Virtual Bus Send Mix-points
(from Mic/Line Inputs)
Virtual Bus Send Mix-points
(from Virtual Bus Returns)
A B C D
Virtual Bus Send
DMP 64 • Software Control 67