Ducker

Ducker blocks are used to duck (attenuate) one signal when the level of another signal exceeds a specified threshold.  The unlabeled input on the upper left side of the Ducker block is for the input signal (i.e., the signal to be ducked).  The input labeled with an S is the sense signal, which is the signal that will trigger ducking to occur when it exceeds the threshold.

More information on logic is located here: Ducker

Ducking can also be triggered via a logic signal instead of an audio sense signal.

• Input Level provides muting and level adjustment for the input signal, which appears as the upper input on the left side of the Ducker.
• Sense Level provides muting and level adjustment for the sense signal, which appears as the lower input on the left side of the Ducker, labeled with an S.
• Threshold determines what sense input signal level will trigger ducking to occur.
• Ducking Level determines how much attenuation is applied to the input signal when ducking is active.
• Attack Time determines how quickly the ducker attenuates the input signal when ducking is activated.
• Release Time determines how quickly attenuation is released when ducking is deactivated.
• Logic In allows ducking to be triggered by a logic signal, connected to the logic input on the top of the Ducker block.  Normally, a logic HIGH signal will trigger ducking to occur, and a logic LOW will deactivate ducking.  When the Invert button is selected, a logic LOW will trigger ducking to occur.
• Logic Out activates the logic output on the bottom of the Ducker block.  Normally, when ducking is activated the logic output will generate a logic HIGH signal.  When the Invert button is selected, the logic output will generate a logic LOW signal when ducking is activated.
• Mix Sense causes the sense signal and the input signal to be mixed together and be sent to the output. When Mix Sense is not enabled, only the input signal is sent to the output and the sense signal does not pass through the block.
• Bypass disables the Ducker without changing settings.

Right-clicking over certain settings will provide a menu of additional options.