sweep

Sweep between HP and LP walls, both played by gesture.

Free to use while in the Lab. May or may not graduate to a release.

What it does

Sweep the signal between two walls, both played by gesture.

Sweep is a high-pass and a low-pass filter in series with a drive stage between them. The two cutoffs frame the audio between a bottom wall and a top wall: bend raises the bottom, pressure raises the top, and the band that passes through is whatever you draw between your fingers. Hold a chord and every finger pulls the walls in its own direction, blended into one filter pair that everything you run through it has to pass through.

The MPE keyboard is the interface. Pressure dials the top, slide rings out the resonance, velocity punches drive on the attack, pitch bend raises the bottom. Link couples the two cutoffs so a single gesture can sweep the entire passband as one. Stack Sweep after Pulse and the same finger gates and filters at once.

MPE routing

One filter per finger.

Every gesture maps to a property of the filter without a sub-menu. Routing amounts scale the depth; direction is hardwired so the play feel stays consistent across presets.

Pressure

Raises this voice's LP cutoff. Lean into the key and the top end opens up; let go and it falls back to the knob value.

Slide (Y)

Opens resonance. Forward = ringing peak at each cutoff knee; back = clean rolloff.

Velocity

Bumps drive on the attack. Hard strikes punch saturation through the filter; soft strikes stay clean.

Pitch bend

Sweeps the HP cutoff up. Bend up to eat the low end; bend down to let the bass back through.

Made to play with

Features.

HP + drive + LP in series
Pressure → top end
Slide → resonance
Velocity → drive
Bend → bottom end
VST3 · AU · macOS (M1+)

Requirements

What it runs on, today.

Quiver plugins are designed MPE-first and tested in real workflows before they ship. The supported set is deliberately narrow right now so every shipped plugin works the way the page describes. Wider coverage comes as each host gets a full pass.

OS support

macOS on Apple Silicon (M1 or newer), VST3 and AU. Windows 10 or later, VST3, 64-bit. Intel Macs are not yet supported.

Tested in

Ableton Live 12, Bitwig Studio, and Reaper. Other MPE-aware VST3 / AU hosts should work.

Logic Pro

Audio effects can't receive MPE in Logic. The host doesn't route per-note expression to effect tracks. We'll lift this note when Apple changes that.

Controllers

Designed for Osmose, Push 3, Seaboard, LinnStrument, Continuum. Plays as a complete static patch on any MIDI keyboard; the per-finger gestural surface unlocks the day an MPE controller arrives.

In the Lab

Free now. Maybe never paid.

Sweep does its job well. The question is whether "MPE-played dual filter" is a category anyone is reaching for. Until we know, it lives in the Lab. Activate sweep to use it free. If we ever ship it as a release, your activation reserves 50% off. If we never do, the Lab build is yours indefinitely.

Try sweep in the Lab About the Lab

Discussion

What's working, what's not.

One thread per plugin. Lab members post feedback. Quiver posts updates about new builds. Real signal in either direction shapes what ships.

Activate sweep in the Lab to join the discussion. Free, no payment.

Activate sweep

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v0.1.0 released March 22, 2026