You send a drum or percussion track to three buses, each with an EQ covering a different frequency range—e.g., kick, snare, and cymbals. These provide three control signals…and here’s what we do with them.
A guitar track feeds an FX Chain with Ampire, which goes into a Splitter that splits by frequency. There’s a gate in each split, and they’re driven by the control signals. So when the kick hits, the guitar’s low frequencies come through. When snare and upper toms hit, the mids come through and when there are high-frequency sounds like percussion, they trigger the highs. You can think of the effect as similar to a mini-vocoder.
The audio example has some Brazilian rhythms triggering the gates, and you can hear the kind of animation this technique adds to the guitar part. The first four measures have the drums mixed with the processed guitar, while the second four measures are processed guitar only.
Fig. 1: The track layout for multiband gating.
The Drums track has three pre-fader sends, which go to the Lo, Mid, and Hi frequency buses. Each bus has a Pro EQ to emphasize the desired low, mid, and high frequencies. Then, each bus has a send that goes to its associated Gate sidechain in the Guitar track (Fig. 2).
Fig. 2: Splitter and Gate setup for multiband gating.
The guitar goes to Ampire, which splits into three frequencies bands thanks ot the Splitter’s Frequency Split magical powers. Each split goes to a Gate, and the sends from the Lo, Mid, and Hi buses feed their respective gate sidechains.
Inserting a Dual Pan after the Mid and Hi gates can enhance the sound further, by spreading these frequencies a bit to the left or right to give more of a stereo spread. You’ll probably want to keep the low frequencies centered.
You don’t have to get too precise about tuning the EQs in the buses, or setting the Splitter frequencies. I set up the Splitter frequencies by playing guitar through the Splitter, and adjusting the bands so that the guitar’s various frequency ranges seemed balanced. As for the Pro EQs in the buses, I just tuned those to the drum sounds until the guitar rhythm was rockin’ along.
This takes a little effort to set up, but multiband gating can add a unique rhythmic kick to your music. Interestingly, you may also find that you don’t need as much instrumentation when one of them is blurring the line between melody and rhythm.