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

7 The Main Metering Functions.

The Main Metering Functions consists of three different metering devices: The

Phase Correlation Meter, The Audio Vector Scope / Jelly-Fish™ and the Peak

Programme Meter (PPM).

7.1 The Phase Correlation Meter.

The ‘Phase Correlation Meter’ is of the so-called ‘Center-Zero’ type, and

displays the phase relationship between two input signals. A stereo signal will

ideally show [0] which indicates a random distributed phase, and therefore the

maximum ambient effect. A mono signal will indicate a [+1].

A signal with reversed phase components will indicate in the area between [0]

and [–1] and when the indicator moves into the ‘non mono compatible’ area

the colour will change to red for easy identification. Never allow negative

indication if the signal is going to be reproduced in mono.

Only major phase components are considered so input signals below a

predefined threshold will force the indicator towards zero.

If the indicator is showing zero it can have different meanings e.g. the signal is

an ideal stereo signal, the signal is only in one of the two channels (left or

right), or there might be no signal at all. The ‘Phase Correlation Meter’ is used

in conjunction with the ‘Audio Vector Oscilloscope’ and the ‘Peak Programme

Meter’.

Please refer to section 5 ‘The Compact Audio Matrix’ on how to select the two

source signals for the ‘Phase Correlation Meter’.

7.2 Audio Vector or Surround Sound Monitoring (Jelly-Fish)

The middle window in ‘Full Feature Mode’ has two functions. It can either be

used as an ‘Audio Vector Oscilloscope’ or as the ‘Jelly-Fish’ Surround Sound

Monitor.

The type of display is depending on the settings in the ‘Audio Matrix’.

The destinations in the ‘Audio Matrix’ from #53 to #62 determines in which

mode the middle window is used.

When a source is selected for destination #53 and #54 (PHAS) only, then the

middle window will show the ‘Audio Vector Oscilloscope’. If sources are

selected for #55 to #62 then the middle window will show the Jelly-Fish and

then the sources for destination #53 and #54 (PHAS) will only affect the ‘Phase

Correlation Meter’. This means that it is possible to monitor the phase

relationship between two channels independent of the ‘Jelly-Fish’. If

destinations #53 and #54 (PHAS) are set to ‘OFF’ then the ‘Phase Correlation

Meter’ and the ‘Audio Vector Oscilloscope’ / ‘Jelly-Fish’ will be hidden.

Note that the Phase Correlation meter and Audio Vector Oscilloscope is

sharing the same destinations in the Audio Matrix (#53 and #54).

Refer to section 5 ‘The Compact Audio Matrix’ for a detailed description

on how to navigate the Audio Matrix.

Please note that it is a good practice to route the signals to the ‘Audio Vector

Oscilloscope’ / ‘Jelly-Fish’ through the ‘Peak Programme Meter’ (destination

#65 to #96 / #74 in surround mode), this way when changing the input to a

Page 18 of 64. PRELIMINARY Release

The Phase Correlation Meter in

the left side of the main screen.

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