Toa M-633D - 9 Setting the Arc Function; What Is the Automatic Resonance Control (ARC) Function; Outline of the ARC Function Settings

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9. SETTING THE ARC FUNCTION
9.1. What is the Automatic Resonance Control (ARC) Function?
It is a function that automatically creates a sound field compensation filter (ARC filter) to improve sound
clarity by measuring the inherent acoustic characteristics in architectural space.
9.2. Outline of the ARC Function Settings
The ARC function automatically creates an ARC filter, thereby reproducing highly clear output sound.
9.2.1. Enabling the ARC function (See p. 13 for details.)
Note
Before operating the ARC function, check that sound is actually output from the speakers after installation
and connection completion.
Select with the Assignment switches the output channel to which the ARC filter is to be set, hold down the
ARC switch for 3 seconds, then release it when the ARC operation indicator begins to flash.
The ARC measurement starts.
The ARC filter is set when the measurement has finished, enabling the ARC function. (The ARC operation
indicator lights.)
Note: To stop measurement partway, press the ARC switch again.
Flashing during
measurement
Measurement in progress
Measurement stops.
Press
ARC
ARC
ARC ARC
Lit
ARC
Unlit
Hold down for
3 seconds.
ARC
Release when the indicator
begins to flash.
9.2.2. Disabling the ARC function (See p. 20 for details.)
Holding down the ARC switch for 8 seconds or more with all the 3 assignment switches of the MONO 1 in
OFF mode (unpressed state) causes the ARC operation indicator to flash. Then it goes off, disabling the
ARC function.
Flashing
ARC
ARC ARC
Unlit
ARC
Lit
Hold down for
8 second or more.
ARC
Release when
the indicator goes off.
3 – 8 seconds
0 – 3 seconds After 8 seconds