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How To Use Logic's Modulator MIDI Plug-in

Apple Logic Pro X Tips & Tricks
By Paul White

The Modulator plug-in is split into two, with the LFO section on the left and the Envelope section on the right.The Modulator plug-in is split into two, with the LFO section on the left and the Envelope section on the right.

Logic's Modulator MIDI plug-in offers some exciting ways to add movement to your music. Find out how...

Other than the popular Arpeggiator, Logic's MIDI plug-ins often get overlooked — perhaps because some of them, like MIDI Note Repeater, seem just to chew up polyphony. However, others, such as the Modulator, can be immensely useful in reshaping the sound of a MIDI instrument. Being a MIDI plug-in, Modulator can only be used on MIDI tracks, but it can be used to control pretty much any parameter on any plug-in inserted below it in the same channel strip — both instrument and effect plug-in parameters — but not the channel strip controls themselves. There doesn't seem to be any way to route their output to control plug-ins in other channels or in audio channels either, which is a pity as I can envisage being able to set up some fun side-chain-style effects that way.

The way this plug-in works is that it generates MIDI data that is either free–running, or triggered by what is playing on the same MIDI track (or via a real-time MIDI input on that track). For the more adventurous there's a Scripter that enables you to create your own MIDI processing and generation scripts, but for this article the area of most interest for me is the ability to very simply assign a plug-in control to be controlled directly from the Modulator plug-in, though the ability to route the modulation directly to pitch–bend or other mainstream MIDI parameters is also very convenient. MIDI plug-ins have their own slot at the top of Instrument channel strips, directly below the EQ box, and show up in green when active.

Panel Show

Modulator's GUI...

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Published December 2019