How do I use parallel processing on individual oscillators in a synth?
Marketing Director & Bass Music Mentor
In Serum 2, I can run any oscillator through parallel processing by clicking the effects bus button, adding effects to bus 1 or bus 2, then returning to the oscillator view and using the F1 knobs next to each wave table to control how much signal gets sent to each bus. This routing system lets me blend the dry oscillator signal with processed versions running through effects like reverb, delay, or parallel compression while keeping the original sound intact. I've found this particularly useful for adding depth to pads or creating aggressive textures without losing the fundamental tone.
Frequently Asked Questions
Do all synths support parallel processing per oscillator?
No. The ability to route individual oscillators to separate effects buses is a more advanced feature found in synths like Serum 2, Hive 2, and some modular environments. Most basic subtractive synths route all oscillators through a shared signal path into a single filter and effects chain. If parallel per-oscillator processing is important to your workflow, check the routing section of the synth before buying.
What effects work best when processing oscillators in parallel?
Distortion and saturation are the most common: you can saturate one oscillator heavily for harmonic richness while keeping another clean for the fundamental. Chorus and chorus-style modulation on one oscillator while leaving another dry adds width without muddying the core sound. Reverb works well for creating layered spatial depth between oscillators. The principle is that contrast between processed and unprocessed layers creates more interesting timbres than applying the same effect to everything.
How is this different from layering two separate instances of the same synth?
Functionally similar, but routing within a single synth instance is tighter: both oscillators share the same pitch information, modulation sources, and MIDI input. When you use two separate instances, keeping them perfectly in sync requires careful routing and introduces latency management issues. Within one synth, the phase relationship and modulation coherence between oscillators is automatic.
Max Pote
Marketing Director & Bass Music Mentor
Max Pote is a professional bass music producer who performs and releases under the name Protohype. He has more than a decade of releases on major bass-music labels (Firepower Records, SMOG, Never Say Die, Rottun, Deadbeats), festival appearances at EDC Las Vegas and Lost Lands, and a feature credit on Tom Morello's 2021 album The Atlas Underground Fire. He was an early Icon Collective alumnus and later returned as an instructor before co-founding Futureproof Music School. He leads marketing at Futureproof and mentors students on sound design, songwriting, and finishing tracks.
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