Parallel Compression Explained: How to Set It Up on Drums and Vocals

Parallel compression means blending a heavily compressed copy of a signal with the uncompressed original, so you get the density and sustain of hard compression while keeping the natural transients. The dry track carries the punch; the compressed copy fills in body and detail. It's also called New York compression, and it's a staple on drums, bass and vocals.

Key takeaways

• Two paths, one sound: the dry signal keeps the attack; the compressed path brings up everything quieter.
• Set it up with an aux send and a 100% wet compressor, or with a compressor's mix knob.
• Compress the parallel path hard, then blend it in until you feel it more than hear it.
• Check timing. Uncompensated plugin latency makes the blend sound phasey instead of bigger.
• Michael Brauer goes further on vocals, blending several compressors with different characters around one dominant sound.

What is parallel compression?

Parallel compression is a technique where the original signal and a compressed version of it play at the same time and are mixed together. Rather than turning loud parts down, it effectively turns quiet parts up.

An insert compressor reduces peaks, which can soften a snare's crack or a singer's consonants. In parallel, the dry track's peaks stay intact. The compressed copy has its peaks squashed, so its quiet details (ghost notes, breaths, room tone) sit close to its loudest moments. Tuck that copy underneath and those details come forward while the peaks barely change. This is a form of upward compression.

• Dry path: the original signal.
• Parallel path: the compressed copy, usually on an aux track fed by a send.
• Blend: the balance between the two, set with the aux fader or a mix knob.

If threshold, ratio, attack and release are still fuzzy, start with audio compression explained.

How do you set up parallel compression?

Here's how to set up parallel compression: send the source to an aux track, put a 100% wet compressor on it, compress hard, then raise the aux fader until the source gains weight without losing its attack.

1. Create an aux track and name it, for example "Drum Smash" or "Vox Para."
2. Add a send from one or several sources. A post-fader send keeps the blend constant when you ride the source.
3. Insert a compressor on the aux with its mix control at 100% wet, and pull the aux fader down.
4. Compress hard: a high ratio, a fast attack and 10 dB or more of gain reduction is a common starting point.
5. Raise the aux fader slowly with the full mix playing. Stop when the source feels thicker and more present, then back off a little.
6. Level-match and compare. Parallel compression always adds level, so compensate before muting the aux, or you'll simply prefer the louder version.

Aux send, mix knob or duplicate track?

What are good parallel compression settings?

Parallel settings are usually far more extreme than insert settings: high ratio, fast attack, heavy gain reduction and a release that recovers with the song. The dry signal protects the transients, so the parallel path doesn't have to.

• Ratio: 4:1 to 10:1 or more; some engineers use a limiter or an 1176-style "all buttons" setting.
• Attack: fast, so the copy carries sustain rather than transients.
• Release: fast to medium, timed to breathe with the groove.
• Gain reduction: often 10 to 20 dB.
• EQ on the return: a high-pass can stop low-end build-up.

Treat these as starting points and judge the blend in the full mix.

Why does parallel compression sometimes sound phasey or thin?

Usually because the two paths aren't time-aligned. If a plugin on the parallel path adds latency and your DAW doesn't compensate, the delayed copy combs against the dry signal and cancels some frequencies.

• Turn on automatic delay compensation, and remember low-latency monitoring modes can suspend it.
• Watch latency-heavy plugins such as linear-phase EQs and lookahead limiters on only one path.
• Run a null test: set the compressor to 1:1, match the aux level to the dry track and flip the aux's polarity. If the sum nearly disappears, the paths are aligned. Plugins that add color won't null completely.

How do you use parallel compression on drums?

Parallel compression on drums means sending the kit, or selected drums, to one heavily compressed aux and tucking it under the natural kit. It adds weight, sustain and room sound without dulling the hits.

• Choose what feeds it. Kick, snare and room mics are common; crushed cymbals turn harsh fast, so send less overhead.
• Control the low end. A crushed kick can swamp the bass; high-pass the return if needed.
• Bass works the same way: the compressed copy keeps notes even while the dry track keeps the attack.

Michael Brauer, the award-winning mixer and Campus mentor behind records for Coldplay, John Mayer and Bob Dylan, builds a whole set of parallel compressors into his template, with names like "Federal," "K Punch," "SN Punch," "Zener" and "Tchad Drums."

How do you use parallel compression on vocals?

Parallel compression on vocals adds density and intimacy: the dry vocal keeps its natural phrasing while the compressed copy lifts low-level detail, so the voice stays forward in a busy track.

• Keep the insert compressor moderate and let the parallel path add the density.
• De-ess and high-pass the parallel path. Heavy compression exaggerates sibilance, breaths and rumble.

How does Michael Brauer blend several compressors on a vocal?

Michael Brauer runs the lead vocal through several compressors side by side and blends them with faders. He picks one dominant compressor, then brings the others up around it, usually ending up around −10 on the fader, to shape the throat, chest and head of the voice.

"The reason why I have five or six different compressors is because they each sound different," he explained in a free info session on Campus. One might be throaty, another has more of a head feel, another is chesty. In the course, these vocal mults carry names like "Face," "Throat," "Lush," "Nose," "Chest" and "Clarity."

Here's how he sets the blend for a new artist:

1. Calibrate first. Every compressor puts out the same level, so switching between them reveals character, not volume.
2. Audition them one at a time on a looping verse, skipping the effect-style ones.
3. Pick a dominant compressor. "I'm building around the one that I like the most."
4. Bring the others up around it. "You'll see one particular compressor as being the dominant one and all the other ones are about minus 10."
5. Do it with the track playing. "You want to do this within the context of the track playing. Not solo."
6. Add color last. "I want to add a little bit more urgency. That's when I'll add the 1176 return."

The setting usually holds for the whole album, unless a song was sung on a different mic or day. His reverbs and delays are fed from the original vocal, not the compressed blend, which, in his words, "just adds to the clarity and the interesting movement in a vocal."

The complete vocal chain is taught in The Brauerize Mixing Method, and the full info session is free on Campus Replays.

Parallel compression vs multi-bus compression: what is the difference?

Parallel compression blends a compressed copy with its own dry signal. Multi-bus compression splits the mix into groups, each compressed on its own bus before summing, so one element doesn't drive gain reduction on everything else.

Brauer uses both, and he sees compression as a way to add life: "I always felt the whole thing with compressors is that they make things more dynamic and louder and bigger and more fun." For his A to E bus system, read our guide to the Michael Brauer mixing method.

How can you practice parallel compression today?

Build a two-compressor parallel blend on a vocal and compare it at matched level. It takes about twenty minutes. If compressor controls are new to you, Foundations of Compression covers them first.

Practice exercise: a two-compressor vocal blend

1. Loop a verse of a lead vocal with the full track playing.
2. Create two auxes with different compressors, such as an optical-style and a FET-style plugin, each 100% wet with heavy gain reduction.
3. Match their output levels.
4. Bring each up under the dry vocal in turn and choose your dominant compressor.
5. Raise the second from silence, then pull it back until you just miss it when muted.
6. Level-match the blend against the dry vocal and write one word for each version.

Frequently asked questions about parallel compression

Is parallel compression the same as New York compression?

Yes. New York compression is a nickname for parallel compression, reflecting its popularity among New York studio engineers. Both describe blending a heavily compressed copy of a signal with the uncompressed original. You'll also hear it called a "smash" bus, especially on drums. The setup is the same whatever you call it.

Should the parallel send be pre-fader or post-fader?

Post-fader is the usual choice, because the parallel path follows the source fader and the dry-to-compressed balance stays constant as you ride the level. A pre-fader send keeps the compressed path at a fixed level even when you pull the source down, so the blend shifts every time you move the fader.

Can I use a compressor's mix knob instead of an aux send?

Yes. A mix or dry/wet knob does parallel compression inside one plugin and handles timing internally, so phase problems are rare. The trade-off is flexibility: you can't EQ or de-ess the compressed signal on its own, or feed several tracks into one shared path. For a drum kit, an aux works better.

How much parallel compression should I blend in?

Blend until the source feels fuller and more stable, then back off slightly. Mute the parallel aux: if the track suddenly sounds thinner or further away, the blend is working. If you clearly hear pumping or exaggerated breaths, it's too loud. Always compare at matched level so loudness doesn't decide for you.

Does parallel compression work on the mix bus?

It can. Some engineers blend a compressed version of the full mix with the original, often with a bus compressor's mix knob. It needs restraint, because every element is affected at once. Multi-bus approaches like Michael Brauer's compress groups separately instead, so turning up one instrument doesn't change the compression on the others.

To see parallel compressors, vocal chains and A to E busses working together in one template, The Brauerize Mixing Method with Michael Brauer builds it with you step by step. It's a 26-hour, advanced, on-demand course with a full module on parallel compressors, video lessons, exercises, a teaching assistant, community forums and lifetime access. Student feedback is on the Campus reviews page.