Practical Mixing
How to use parallel compression on vocals in REAPER
Published August 26, 2026
Parallel compression means blending a heavily compressed copy of the vocal under the untouched original, so you add weight and consistency without squashing the natural dynamics. The fastest way in REAPER is a single stock ReaComp: set it to crush hard (low threshold, high ratio, fast attack), then bring the Dry slider back up so the compressed and uncompressed signals mix together. For more control, send the vocal to a second track and compress that instead. It is a polish move, not a rescue: it will not fix pitch, tone, or a shaky performance.
If you have ever pushed a normal vocal compressor harder and harder trying to make the voice sit steady, only to end up with something flat and lifeless, parallel compression is the technique you were reaching for. Instead of compressing the vocal you keep, you compress a copy and blend it underneath. The loud parts stay natural, the quiet parts get lifted, and the vocal feels denser and more present without sounding crushed.
It is sometimes called New York compression, and every REAPER install can do it with stock plugins. Below are two ways to set it up, from fastest to most flexible, plus starting settings and an honest list of what it will not do.
What parallel compression actually is
Regular compression turns down the loudest parts of a signal so the overall level is more even. Push it too far on a vocal and you flatten the dynamics that make it sound alive. Parallel compression avoids that trade by running two signals at once:
- The dry vocal, untouched, keeping all of its natural loud-and-soft movement.
- A heavily compressed copy, squashed until it is almost a flat, dense version of the same performance.
When you blend the compressed copy quietly underneath the dry one, the compression mostly raises the quiet detail (breaths, tails, low-level consonants) rather than clamping the peaks. The result is a vocal that sounds fuller and more consistent while still breathing. Because you are adding the two signals rather than replacing one with the other, you keep the transients you would otherwise lose.
When to reach for it (and when not to)
Parallel compression earns its place when a vocal is technically fine but feels thin, small, or inconsistent in the mix, dipping away in quiet phrases and never quite feeling glued. It is a density and consistency tool.
It is the wrong tool when the real problem is tone or performance. If the vocal is muddy, boxy, or harsh, that is an EQ or de-esser job first. If notes are out of tune or timing is loose, no amount of compression fixes that. Reach for parallel compression after the recording is clean and roughly balanced, not before.
Parallel compression sits near the end of the chain. Get your levels set with good gain staging, clear obvious tone problems with EQ, and apply your everyday vocal compression settings first. Then use parallel compression to add the last bit of weight.
Method 1: one ReaComp with the wet/dry sliders (fastest)
ReaComp, REAPER’s stock compressor, has separate Wet and Dry faders on the left side of its window. That means you can do parallel compression inside a single plugin, no routing required. This is the quickest way to try the effect.
Add ReaComp to the vocal track
Open the vocal track’s FX chain and add ReaComp. If you already run a compressor for everyday leveling, add this as a second, separate instance so the two jobs stay independent.
Set it to compress hard
Pull the Threshold down until you see a lot of gain reduction on the loud parts, often 10–20 dB. Set a high Ratio, somewhere around 4:1 up to 10:1 or more. Use a fast Attack and a medium Release. It should sound too crushed on its own, that is expected.
Blend the dry signal back in
Raise the Dry slider from off until the uncompressed vocal returns underneath the compressed one. Start with the compressed (Wet) signal clearly quieter than the dry, then nudge it up until the voice thickens and steadies without sounding squashed.
REAPER also adds its own Wet knob to the top of every plugin window. That knob crossfades between the plugin’s output and the original, while ReaComp’s own Wet and Dry sliders add the two together. Either can give you a parallel blend. Pick one and leave the other at its default so you are not fighting yourself.
Method 2: a dedicated parallel track (more control)
Blending inside one plugin is fast, but a separate compressed track gives you far more room to shape the effect. This is the method most engineers default to, because you can EQ or saturate the compressed copy on its own and ride its level from the mixer.
Create a parallel track and send to it
Make a new track named something like “Vocal Parallel.” On the vocal track, add a send to that new track. This copies the vocal to the parallel track while the original keeps playing untouched. A vocal bus is a natural home for this, see how to use a vocal bus in REAPER.
Crush ReaComp on the parallel track only
Put ReaComp on the parallel track and set it to compress hard, the same low-threshold, high-ratio, fast-attack starting point as Method 1. Leave the Dry slider off here, because the dry vocal already exists on the original track.
Pull the parallel fader down, then up to taste
Start with the parallel track’s fader all the way down. Raise it slowly under the main vocal until the voice gains weight and stops disappearing in quiet moments. If you want, add a gentle EQ after the compressor to shape only the compressed layer.
With stock ReaComp there is no added latency, so the compressed copy lines up with the original. REAPER also applies automatic plugin delay compensation, so even a plugin that does add latency stays aligned. That is why this simple send-based setup does not cause the phase problems people sometimes worry about.
Starting settings, not universal presets
Every voice and mix is different, so treat these as a place to begin and then trust your ears in the full mix.
| Control | Starting range | What it does here |
|---|---|---|
| Threshold | Low enough for 10–20 dB gain reduction | Catches almost the whole vocal so the quiet detail comes up |
| Ratio | 4:1 to 10:1 or higher | Flattens the copy so it acts as a dense layer |
| Attack | Fast | Clamps quickly for a solid, controlled tone |
| Release | Medium, timed to the song | Lets the level recover between phrases without pumping |
| Blend | Compressed layer clearly under the dry | Adds body while the dry keeps the dynamics |
Dial the blend by ear. A useful test is to bring the compressed layer up until you clearly hear it thickening the voice, then back it off slightly. You almost always want less than it takes to notice it as an obvious effect.
What parallel compression will not do
It is a finishing move with real limits. Knowing them keeps you from chasing the wrong fix.
- It will not fix tone. Mud, boxiness, and harshness are EQ and de-esser problems. In fact, crushing a copy can make existing harshness or sibilance more obvious, so clear those first. See the vocal EQ cheat sheet and how to de-ess vocals in REAPER.
- It will not fix pitch or timing. Those need tuning and editing, not compression.
- It raises the quiet stuff you may not want. Breaths, room tone, mouth noise, and background hiss all come up along with the good detail. On a noisy home recording that can be a real downside.
- It is not a loudness maximizer. It adds density and a sense of consistency, not final streaming loudness. That is a limiter and metering job.
- Pushed too far it pumps and dulls. If the vocal starts breathing unnaturally or loses its snap, you have blended in too much. Pull the compressed layer down.
Parallel compression thickens a vocal by mixing a heavily compressed copy under the untouched original, so you keep the dynamics and gain density and consistency. In REAPER, do it fast with ReaComp’s Wet and Dry sliders, or with more control by sending the vocal to a crushed parallel track. Start with heavy compression, blend the copy quietly underneath, and stop as soon as the voice sounds fuller rather than squashed.
Want a clean vocal to start from?
Parallel compression works best on a vocal that is already clean and controlled. The free StudioRescue vocal chain measures your vocal and sets REAPER’s stock plugins for the everyday EQ and compression moves, so you have a solid base to add this on top of. Stock plugins only, nothing to buy.
Get the free vocal chainSources
- Cockos, REAPER User Guide (current version 7.x, 2026) - ReaComp stock compressor with threshold, ratio, attack, release, knee, and wet/dry controls. reaper.fm/userguide
- Cockos, REAPER Effects Summary Guide - parameter reference for the stock ReaComp compressor. reaper.fm/guides/ReaEffectsGuide.pdf
- Cockos, “ReaPlugs” - ReaComp bundled with REAPER as part of the stock plugin set. reaper.fm/reaplugs
- Sound on Sound, “For parallel compression, should I use different tracks or a compressor’s wet/dry control?” - notes ReaComp’s separate wet and dry paths and the added flexibility of a dedicated parallel channel. soundonsound.com