You'll instantly get the idea if you use it as a modulation source, with Pitch as a Destination and the Via field left empty (off).īy contrast, the side-chain input on ES1 can be used as either an audio modulator or an audio source. Instead the incoming audio is passed through an envelope follower which measures the level of the incoming audio and sends a control signal accordingly. When the side-chain signal is used for modulation in EXS24 or ES2, it is not the actual audio that is used (as it would be, for example, in amplitude, frequency, or ring modulation). You can also modulate the modulation depth for other control assignments using the Via field. Side-chain control is possible within the modulation matrices of EXS24 and ES2 - in other words, any parameter can be modulated according to the level of incoming side-chain audio. It can be selected either as a modulation source or as a modulation amount control (labelled Via) in either plug-in's modulation routing matrix. The side-chain input on EXS24 and ES2 is strictly for modulation purposes. These include the EXS24 sampler the ES1, ES2, and Sculpture synths and the EVOC PS polysynth-vocoder. Let's start with a look at the Logic instrument plug-ins that support side-chains. The drop-down menu under the Side Chain label allows you to select any Logic track, input, or buss as the source of the side-chain signal (as pictured above).
When a side-chain input is available it is located at the right-hand end of the gray strip at the top of the plug-in's control panel. With a synthesizer, on the other hand, Logic 's side-chain inputs are often used to process audio using the synth's filters and effects.Ī number of Logic and Audio Units plug-ins offer side-chain inputs. For example, feeding a separate audio track to a compressor side-chain allows you to create ducking effects. Side-chain audio is often used for some control purpose. So what can you do with them?Ī side-chain is an auxiliary audio input to a synthesizer or effects processor. Side-chains are usually associated with effects processing, but they are also available in many of Logic 's internal soft synths. To assign any signal in Logic's mixer to a plug-in's side-chain, click on the Side Chain button which appears at the top of every suitable plug-in to access a drop-down menu.
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