Pumpit

Volume Ducker

"Precision volume ducking with 10 curve shapes, three trigger modes, and a custom hand-drawn spline editor — from subtle groove pumping to aggressive sidechain crush."

Get that pumping groove on any track. Pumpit is a tempo-synced sidechain ducker that shapes your signal with a volume-ducking envelope — sync it to tempo, trigger it from a sidechain input or MIDI notes, or draw the curve by hand. Ten curve shapes plus a custom spline editor and a Linkwitz-Riley multiband split give you everything from subtle movement to hard four-on-the-floor pumping. Free, Signed and notarized on macOS, code-signed on Windows. AU, VST3, CLAP, AAX and Standalone on macOS; VST3, CLAP and Standalone on Windows.

Pumpit — Volume Ducker — plugin interface for Mac and Windows
Download Free All Plugins Read the Guide Try Pumpit Raw (Free)
AU VST3 CLAP AAX Standalone macOS Windows

FEATURES

Ducking Engine

◆10 curve shapes: Smooth, Punchy, Hard, Slow, Long Tail, Half Sine, Log, Exponential, Linear, and a hand-drawn Custom curve with Catmull-Rom spline interpolation
◆Amount (0–100%), Hold (0–50%), and Offset (−50% to +50%) controls, plus tempo-synced Rate at 1/1, 1/2, 1/4, or 1/8
◆Stereo Offset (0–20ms) shifts the left/right ducking timing for a wider stereo feel
◆5ms lookahead with plug-in delay compensation reported to your DAW, so ducking stays aligned to the beat

Three Trigger Modes

◆Auto — tempo-synced free-running envelope at 1/1, 1/2, 1/4, or 1/8 divisions
◆Sidechain — trigger from an external input with an HP filter (20–500 Hz) so low end doesn't over-trigger, plus Retrigger and SC Listen audition
◆MIDI — note-on triggers filtered to a specific note or Any

Multiband & Output

◆4th-order Linkwitz-Riley multiband ducking — duck only the low band, pass highs through unprocessed
◆Auto-gain compensation via 128-point numerical integration of the curve integral
◆Soft clipper output stage (tanh knee at 0.9) + dry/wet mix for parallel processing
◆Sidechain listen (SC) toggle — audition what the detector is hearing

Monitoring & Workflow

◆Real-time curve display with waveform ghost overlay, phase position indicator, and 4×8 grid
◆Input, Gain Reduction, and Output level meters at 30 Hz with thread-safe atomics
◆A/B comparison, Randomize, and preset save/load
◆11 factory presets tuned for tech house and club production

FACTORY PRESETS

Init
Subtle Pumpit
Tech House Standard
Deep House Groove
Aggressive Pumpit
Bass Only Duck
Half Time
Eighth Note Chop
Long Tail Pumpit
Pad Ducker
Remi Blaze Pumpit

SYSTEM REQUIREMENTS

  • OS macOS 15.0 (Sequoia) or later · Windows 10 or 11 (64-bit)
  • Architecture Apple Silicon + Intel (Universal Binary) · x64 on Windows
  • Formats macOS: AU, VST3, CLAP, AAX, Standalone. Windows: VST3, CLAP, Standalone
  • DAW Any AU, VST3, CLAP or AAX compatible host
  • Access Free — no account required

DOWNLOAD FREE

Pumpit is free — no account, no wallet, no strings. Download the installer and drop it in your DAW.

Download Free All Plugins

Licensed under the Freeware License.

FREQUENTLY ASKED QUESTIONS

Is Pumpit free?

Yes. Pumpit is completely free, with no account, no subscription and no trial period. Pumpit Raw is the one-knob version if you want something even simpler.

Does Pumpit run on Apple Silicon and Windows?

Yes. Pumpit is a Universal Binary that runs natively on Apple Silicon (M1/M2/M3/M4) and Intel Macs, and it also ships as a 64-bit build for Windows 10 and 11.

Which formats and systems does Pumpit support?

AU, VST3, CLAP, AAX and a Standalone app on macOS 15.0 or later, as a Universal Binary for Apple Silicon and Intel Macs. VST3, CLAP and a Standalone app on Windows 10 and 11, 64-bit. AAX ships on macOS only.

How do I install Pumpit?

On macOS, double-click the .pkg installer and follow the prompts; it installs every format at once. On Windows, run the .exe installer. The macOS build is code-signed and notarized by Apple and the Windows build is Authenticode signed, so neither needs a security override. No dongle and no extra account.

How is Pumpit different from Pumpit Raw?

Pumpit Raw is the one-knob version: the same engine behind a single macro, with the detailed controls hidden. Pumpit gives you the full control set.