One Slider

PUMPER

Tempo-Synced Volume Pump

Download free Part of NULL JSFX 2.5: 113 plugins, free and open source (MIT). Easiest with NULL JSFX Hub.

Listen

The same music with the Heavy EDM Pump preset and without the plugin. Switch while it plays.

Controls

Amount0 to 100 — Depth of the dip on every beat: 0 has no effect, 100 ducks the level by up to -20 dB before it swells back over the beat

Best uses

Fake sidechain pumping on pads
EDM-style breathing on a synth bus
Rhythmic movement on sustained chords
Groove on reverb returns
Quick ducking effect without routing

Properties

Input → gain from a quarter-note envelope locked to the project tempo (fast fade down over 2% of the beat, smooth S-curve release over 60%) → Output. Follows the beat position during playback and free-runs at the project tempo when stopped; zero latency.

Formats

JSFXJSFX for REAPER, with REAPER's own sliders
GFXJSFX GFX for REAPER, with its own interface
VST3VST3 for any DAW
CLAPCLAP for any DAW

Factory presets

Subtle Breathing · Reverb Return Groove · Pad Pump · Heavy EDM Pump

In the FX chains and Rack presets

Build-Up · Stepped Autopan

See every FX chain

Try it

Try it on orOS StudioAdd it to a track in your browser, with its own interface. Nothing to install.