Overview of multichannel effects in Logic Pro

Effects that are not available as true surround effects can be inserted as multichannel effects in surround channels. Logic Pro matches the surround format of a channel by automatically providing the required number of stereo and mono instances of the plug-in.

Multichannel effect plug-ins have an advanced plug-in header.

Figure. Advanced plug-in header on multi-channel effect plug-in.

The plug-in header can include a tab for each effect instance, an LFE tab, and a Configuration tab . For more information, see Configure multichannel effects in Logic Pro.

The effect tab labels indicate if effect instances are loaded in stereo or mono. Channels joined with a hyphen (-) are loaded as a stereo instance. Channels separated with a vertical bar (|) are mono.

  • L-R|Ls-Rs|C: Denotes left/right stereo, left/right surround stereo, mono center.

  • L-R|Rs|C (a separate left surround tab is shown): Denotes left/right stereo, mono right surround, mono center.

  • L-R, C, and Ls-Rs shown on three separate tabs: Denotes left/right stereo, center mono, left/right surround in stereo.

  • Couple button: When active, this applies the parameter changes you make in one tab to the same parameters in the other tabs.

Each effect tab addresses a discrete effect unit for each channel (or channel pair). Each tab can have different parameter settings.

Click each tab to change plug-in parameters for the L-R tab, the C tab, the Ls-Rs tab, and the LFE tab. The parameter values of each tab are memorized when you save a plug-in setting.

Side chains and surround effects

When inserting a side chain–capable plug-in, the side chain source (selected in the plug-in header) is routed to all surround instances.

The detection circuits of grouped plug-in instances are linked, and react as one unit. This ensures that the spatial surround image is not skewed or deformed.

Note: This is also true when no side chain input is selected. In this case, the group’s combined individual inputs are used to feed the linked detection circuit—effectively acting like a side chain source.

Download the guides:

Logic Pro User Guide: Apple Books | PDF

Logic Pro Instruments: Apple Books | PDF

Logic Pro Effects: Apple Books | PDF

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