Ducking

Ducking is using a compressor to turn down 'Signal A' whenever 'Signal B' starts.
For example, a dj is playing music and he wants it to get softer every time he talks into his microphone so that he can be heard clearly. He could set up a compressor so that the signal from his mic is split to the compressor 'key input' while the music passes through the compressor itself, that way whenever he says anything into the mic the compressor will kick in and 'Duck' the music.
 
Quack!

Ducking is when you have one signal push (duck) down the volume of a second signal. This is accomplished with a compressor. You run the sound you wish to be ducked into the main in/out. You then connect the sound that will not be ducked into the sidechain input. When signal is present at the detector circuit (side chain) the main signal (in/out) will be compressed. Most compressor manufacturers have detailed app descriptions in their manuals. You can usually download them.

Tom Cram
dbx Senior Technical Support
(801) 568-7530
tcram@dbxpro.com
 
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