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MSD Software Manual PRELIMINARY Release Chapter 6 The Extended Audio Matrix.

6.4.3.1 Routing audio to the SUM and Difference amplifier.

Audio signals to and from the 'Sum and Difference Amplifier' is routed using the

'Audio Matrix'. The 'Sum and Difference Amplifier' has two inputs and two

outputs. The inputs to the amplifier is found in the 'Matrix Destination List' as

destination #49 ‘SUM1’ and #50 ‘SUM2.’ The outputs from the 'Sum and

Difference Amplifier' is found in the 'Matrix Source List' as sources #55 ‘SUM’

and #56 ‘DIFF’.

Equivalent schematic of the 'Sum and Difference Amplifier'.

6.4.3.2 Adjust output gain for the SUM and Difference amplifier.

As with any other output in the MSD, the output gain (amplification) for the

'Sum and Difference Amplifier' can be changed. As default, the SUM output

from the amplifier will if the signals are of the same level and phase amplify

with 3 dB.

To adjust the output gain for the 'Sum and Difference Amplifier', use the

[] / [] keys in the 'Extended Audio Matrix' to move the cursor to the

‘G-GAIN’ column, and then use the use the [] / [] keys to move the cursor

to destination #49 ‘SUM1’. Press the [Option] key to enter the ‘Output Gain’

menu.

The output gain menu.

In the ‘Output Gain’ menu use the [] / [] keys to adjust the output gain and

then press [Exit] when done. When done use the same procedure to adjust

the output gain for destination #50 ‘SUM2’. The output gain for destination #49

and #50 must be set to the same level.

The output gain can be adjusted in steps of 0,5 dB between –6 dB and +6,0

dB.

If the amplification in the 'Sum and Difference Amplifier' should be lowered from

+6dB to +3dB, the the ‘G-GAIN’ value for each destination should be set to -1,5

dB. The reason for this is that a +3dB amplification is 3dB lower than the

standard +6dB and is therefore deducted from +6dB. Since the 3dB that has to

be deducted has to be divided between two channels the result is -1,5dB for

each channel.

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DK Digital CDB-600 Spezifikationen Seite 21