The Levels suite

Zuul Gate

FORMAT AU · VST3 · Standalone£14.99Early-bird

Gates set in seconds - it reads the track and places the thresholds for you. Then adds punch on the way out.

A modern gate / expander / ducker - one engine, Gate or Ducker mode, with an internal or external sidechain detector (own HP/LP + Listen), Peak/RMS/Auto detection, lookahead, open/close hysteresis, a shaped envelope and creative range tools. A brain consumer with a bespoke computed gate in AUTO.

Early-bird pricing

These are launch prices and they will go up as the suite fills out. What you buy now is yours at that price for good: every future update is included, including the versions that cost more later. There is no subscription and no upgrade fee.

Zuul Gate - the interface
Zuul Gate - the interface

demo

See it work.

Demo coming soon

what's in it

Every control, and what it's for.

Controls marked Brain are the ones the Analyser can set for you on an ANALYSE pass.

01

Detector & sidechain

Key source

Mono sum of the internal input or the external sidechain bus (may be disabled / mono / stereo).

HP / LP + Listen

12 dB/oct Butterworth HP (20 Hz–2 kHz) and LP (200 Hz–20 kHz) on the detector path only (never the audio). Listen routes the filtered key to the output to tune by ear.

Detection modeBrain

Peak (fast follower), RMS (~15 ms window), or Auto (crest-factor hybrid - peak on transients, RMS on sustained).

02

Gate action

Open / Close hysteresis

Opens above Open, closes below Close (= Open + a ≤0 offset). The gap is the anti-chatter window, drawn literally on the threshold meter with the live detector level.

Mode: Gate / Ducker

Flips the rest/engaged target: in Gate the loud state passes (engaged = unity); in Ducker the loud state attenuates. Everything else is shared.

Envelope

Attack (one-pole) toward the engaged gain, Hold latches the open state, Release shaped by Linear / Exponential / Musical (the last slow-then-fast for natural tails).

Range / Hard Mute

When closed, the floor is the Range value - or full silence with Hard Mute.

Lookahead

0–10 ms, latency-reported to the host and bypassable. The detector reads the live key while audio is delayed, so the gain change lands slightly before the transient.

03

Creative extras

Transient enhanceGate only

A short, fast-decaying leading-edge boost (0–6 dB) fired on the open edge. Off by default.

Frequency-selective range

When closed, attenuation isn’t flat - a low/high-shelf tilt (fixed 250 Hz / 4 kHz corners) deepens as the gate closes, so cymbal bleed goes darker rather than just quieter. Open signal is left uncoloured. LOW/HIGH knobs appear only when enabled.

AUTO (computed gate)Brain

Reads a bespoke gate the brain computes from the channel’s measured data (thresholds from actual RMS/peak, hysteresis & envelope from crest, HP/LP bracketed to where energy sits) - so two snares with different tunings get different gates. Applies on the master ANALYSE broadcast and when its own AUTO is on. Any gate-shaping edit drops out.

The Analyser only sets the measurable things - thresholds, timing, the detector filter. Gate or Ducker, hard mute, the frequency-selective range, sidechain source, Listen and Output all stay yours. Zuul reads from the Analyser but never writes back to it.

quick start

Four steps to a sound.

  1. Insert after Analyser; pick Gate or Ducker mode.
  2. Set the Open threshold to meet your loudest wanted hits, and Close a range below (the gap is the anti-chatter window - drawn on the meter).
  3. Tune the detector: HP/LP filter (use Listen), Peak/RMS/Auto, and lookahead for fast transients.
  4. Shape the tail with Attack / Hold / Release (+ curve); or run AUTO for a gate the brain computes from measured level/crest/spectrum.

Not currently suitable for Pro Tools

These are AU and VST3 plugins. Pro Tools only loads AAX, which these aren't built as - so none of the suite will appear in it. Please check your DAW before you buy - once you download, the sale is final.

Get Zuul Gate

AU · VST3 · Standalone - macOS 10.15 Catalina or later, Windows (VST3). Installers are not yet notarised, so there's one extra click on first install; the install guide walks through it.

Where it's confirmed to work

Honest version: this is a one-person operation, so it has been properly tested in the DAWs below and not yet in the others. Not tested yet means exactly that - not that it fails.

DAW compatibility
DAWSystem Plugins load They share with each other
Logic PromacOSYesYes
GarageBandmacOSNot tested yetNot tested yet
Ableton LiveMac/WinNot tested yetNot tested yet
Cubase / NuendoMac/WinNot tested yetNot tested yet
Studio One
Confirmed on Windows (VST3). The sharing side is still to be checked.
Mac/WinYesNot tested yet
Reaper
Confirmed on Intel Mac - both AU and VST3, and the plugins share with each other. Not yet tested on Windows.
Mac/WinYesYes
FL StudioMac/WinNot tested yetNot tested yet
Bitwig StudioMac/WinNot tested yetNot tested yet
Digital PerformerMac/WinNot tested yetNot tested yet
Pro Tools
Pro Tools only loads AAX plugins. These are AU and VST3.
Mac/WinNoNo
Operating system compatibility
SystemConfirmed
macOS on IntelYes
Confirmed working from 10.15 Catalina upwards.
macOS on Apple SiliconYes
Confirmed on an M4 Mac in Logic Pro. The installers are universal binaries, so they run natively - no Rosetta needed.
Windows 10 / 11Yes
VST3 only - there is no AU on Windows. Confirmed in Studio One.

"They share with each other" is the ANALYSE pass, the clash matrix and the AUTO settings. Where a DAW keeps plugins apart, every plugin still works perfectly on its own - they just can't pass measurements between them, and nothing breaks. Ten-second check in any DAW: put Analyser on two tracks, turn one to master, and see whether the second track appears in its overview. Tell me what you find and this list gets updated.

Part of The Levels suite - see also: