Extron electronic DMP 64 manual Secondary Mix Matrix

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.

TRIM

LOUD

DLY

FILT

DYN

VOL

1

TRIM

LOUD

DLY

FILT

DYN

VOL

2

TRIM

LOUD

DLY

FILT

DYN

VOL

3

TRIM

LOUD

DLY

FILT

DYN

VOL

4

Inputs

Outputs

1

Mic/Line Input 1

GAIN

FILT

FBS

DYN

DYN

DLY

DUCK

GAIN

2

Mic/Line Input 2

GAIN

FILT

FBS

DYN

DYN

DLY

DUCK

GAIN

3

Mic/Line Input 3

GAIN

FILT

FBS

DYN

DYN

DLY

DUCK

GAIN

4

Mic/Line Input 4

GAIN

FILT

FBS

DYN

DYN

DLY

DUCK

GAIN

5

Mic/Line Input 5

GAIN

FILT

FBS

DYN

DYN

DLY

DUCK

GAIN

6

Mic/Line Input 6

GAIN

FILT

FBS

DYN

DYN

DLY

DUCK

GAIN

Virtual Bus Send Mix-points

(from Mic/Line Inputs)

Virtual Bus Return A

FILT

DYN

LOUD

GAIN

B

FILT

DYN

LOUD

GAIN

C

FILT

DYN

LOUD

GAIN

D

FILT

DYN

LOUD

GAIN

Virtual Bus Send Mix-points

(from Virtual Bus Returns)

Secondary Mix

A

B

C

D

Virtual Bus Send

Matrix

Figure 44. Secondary Mix Matrix

DMP 64 • Software Control 67