Инструкция для EXTRON ELECTRONICS IN1608 MA User Guide, IN1608 SA User Guide, IN1606 User Guide, IN1608 Series User Guide

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IN1606 and IN1608 Series Scaling Presentation Switcher • Internal Web Pages

79

Ducking parameters

Ducking lowers the level of microphone or program material (based on a source signal from 
another microphone) for the duration of the signal that is present at the source microphone. 
It restores the original level after the source signal ceases and after the hold and release 
times are met. This is useful when:

• 

Program material must be attenuated in order to accentuate the voice of a narrator.

• 

One microphone is used by a chairman or master of ceremonies and must have priority 
over other microphones and program material.

• 

A paging microphone must attenuate all other signals.

To apply ducking for microphone inputs:

1. 

Click the 

Mic/Line Input

 tab.

2. 

From the desired Mic/Line input panel, select the 

Enable Ducking

 check box. The 

following ducking options become available:

• 

Threshold — Sets the input signal level in dB that the ducking source must exceed 
before ducking begins. The default is -30 dBFS.

• 

Hold time — Determines the time in ms after a ducking source signal drops below 
the threshold before ducking ceases. The default value is 1000 ms.

• 

Release time — Determines how long in ms the ducking targets take to restore 
signal levels after the ducking source level is below the threshold and the hold time 
is met.

• 

Duck (targets) — Shows all potential targets to be attenuated when ducking is 
enabled.

• 

Duck by (attenuation) — Attenuates the corresponding duck target in dB.

3. 

In the 

Threshold

 field, adjust the value by one of the following methods:

• 

Enter a value in the 

Threshold

 field and press the <Enter> or <Tab> key.

• 

Click the 

Up

 or 

Down

 arrow buttons.

If ducking does not occur quickly enough to avoid loss of speech or program 
material from the ducking source, decrease this setting. If ducking occurs too soon, 
allowing background noise to trigger ducking, increase the setting.

4. 

In the 

Hold Time

 field, adjust the value by one of the following methods:

• 

Enter a value in the 

Hold Time

 field and press the <Enter> or <Tab> key.

• 

Click the 

Up

 or 

Down

 arrow buttons. The default value is 1000 ms.

5. 

In the 

Release Time

 field, adjust the value by one of the following methods:

• 

Enter a value in the 

Release Time

 field and press the <Enter> or <Tab> key.

• 

Click the 

Up

 or 

Down

 arrow buttons.

6. 

In the list of 

Duck (target)

 check boxes, select the targets to attenuate when the 

threshold is met. Only selected inputs are ducked.

NOTE:  Only one mic input can be selected as a duck target at a time.

7. 

For those targets checked in step 6, adjust the adjacent 

Duck By

 field in one of the 

following methods:

• 

Enter a value in the 

Duck By

 field and press the <Enter> or <Tab> key.

• 

Click the 

Up

 or 

Down

 arrow buttons. The default is 20 dB. If additional attenuation of 

a target is required, increase this value.

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