Stereo Guitar Amp Processing in Logic Pro X

a screenshot of the Universal Audio Chandler Limited GAV19T guitar amp plugin in Logic Pro X

Logic Pro X lends itself very nicely to the task of processing a mono guitar in stereo. In this video, sponsored by Universal Audio, I’m going to use two different Universal Audio guitar amp plug-ins, the Chandler Limited GAV19T, and the Engel E646VS, to create a nice rich, thick ethereal guitar solo sound.

Mono to Stereo

There are several ways to set up stereo processing of a mono track. Here’s the way I like to do it:

  • Route your guitar track output to an unused Bus. This automatically generates an Aux Track set to stereo, with the appropriate bus set as the input.
  • Convert it to mono by clicking on the format button at the top of the Channel Strip in the Mixer.
  • Then create a new unused Aux Track (default key command is Control + N in the Mixer). Set this to the same input.

You now have the same signal arriving at two mono busses. They can be processed and panned individually for a fully customizable stereo image.


In the following video, I use a different Universal Audio amp on each channel. Of course, the tones are different but blended together, they create a unique and rich sound. This is a relatively clean guitar part, but I don’t like going too clean. I used the third channel on the Engel E646VS for a sound with a bit of bite, but that is not too overdriven.

I chose something nice and warm sounding in the Chandler Limited GAV19T with the Tone set to thick, and the boost at +4. Then, I set up a contrasting delay offset from the Engel amp, to create some nice cross-rhythms. I ran these both through Logic Pro X’s Space Designer and panned to taste.

Eli Krantzberg
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Eli Krantzberg

Apple Certified Pro Eli Krantzberg is an internationally known author and music software trainer for Groove3. His instructional videos have helped demystify music software such as Logic Pro, Pro Tools, Sonar, BFD, Melodyne, and Kontakt for thousands of users all over the world. Based in Montreal, Canada, Eli is involved in all aspects of audio production. In his studio he works with various artists, as well as on commercial jingles, corporate videos, and original music composition.
Eli Krantzberg
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