Apple Logic Pro 9 Manual de usuario descargar pdf (Pagina 287)

Side Chaining Plug-ins

All plug-ins that support side chain inputs feature an additional Side Chain menu at the

right of the plug-in window header. This allows you to route any audio, input, or aux

channel strip into the plug-in, via a side chain.

To route an instrument channel strip as the side chain signal (alternative approach)

1 Click the instrument channel strip’s Send slot, and choose an unused Bus from the pop-up

menu.

This creates an aux channel strip.

2 Click the Output slot of the aux channel strip, and choose No Output from the pop-up

menu.

This turns off the output signal of the aux channel strip, which you don’t want to hear.

3 Open the required plug-in from the instrument channel strip, and choose the

newly-created aux channel strip from the plug-in’s Side Chain menu.

The plug-in processes the audio of the aux channel strip selected in the Side Chain menu,

and not the audio of the instrument channel strip that the plug-in is inserted into.

The signal peaks of the side chain input (the sent instrument signal), combined with the

Threshold parameter of the plug-in, determine when the plug-in is triggered.

The following are some side chaining examples:

• A sustained pad sound is sent through a noise gate, which is triggered by a drum track

being used as the side chain input signal. This results in a rhythmic pad sound which

follows the signal peaks of the drum track.

• A noise gate inserted into a bass guitar channel is triggered by the kick drum track via

the side chain. This can tighten the timing of the bass guitar, as it follows the kick drum

signal.

• Side chains can also be used to blend a music mix with a voiceover. To achieve this,

the mix needs to be routed through a compressor which, in turn, is side chained, using

the voice-over track. In this type of setup, the music becomes softer when the narrator

is speaking, and louder when not. The effect is also known as ducking. Note that in

order for this to function, the Automatic Gain Make-up or Auto Gain control (if applicable

to the Compressor plug-in) must be disabled.

287Chapter 10 Working with Instruments and Effects

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Apple Logic Pro 9 Manual de usuario Pagina 287