EQ
Causa
One EQ, four phases.
$129 $65Intro offer one-time purchase
Overview
Causa is a 24-band parametric EQ. Bands go straight onto the curve: place one, drag it, choose its shape. The vertical axis stretches on its own to fit whatever you build.
Most EQs that offer a choice of phase offer a choice between not moving it at all and moving it as little as possible. Causa adds a third option — the phase behaviour of a real analogue EQ — and one button takes you from there to phase that does not move at all. Whichever you pick, the frequency response does not change by a hair.
Flat phase comes with a little energy arriving ahead of the sound. Perceptual mode holds that back while keeping the character of flat phase, which is the reason it is there.
Any band can also carry dynamics, on its own: Dynamic moves the whole band once the level crosses a threshold, Spectral holds down only what protrudes inside the band, and Expansion lifts whatever falls below.
Key features
Four phase modes
Native with no latency at all, Analog at 6.7 ms for an analogue EQ's phase at much higher precision, then Perceptual and Linear. The menu runs top to bottom by increasing latency.
The curve does not move
Switching phase changes what happens to phase and nothing else — the frequency response is the same in all four. Switching settles in about 0.1 to 1 second and audio keeps playing throughout.
24 bands, eight shapes
Bell, Low Shelf, High Shelf, Notch, High-Pass, Low-Pass, Band-Pass and Tilt Shelf. High-Pass and Low-Pass run 6 to 48 dB/oct. Notch, HP, LP and Band-Pass carry no gain and act as frequency handles.
Q to 40
10 Hz to 30 kHz, ±30 dB, Q from 0.1 to 40. Wide enough to shape a whole region and narrow enough to take out one resonance.
Dynamics, per band
Dynamic, Spectral or Expansion on any band, one at a time. Threshold sits at AUTO by default, which leaves RNG as the only control you need — and RNG is the depth itself, so −3 moves 3 dB.
Spectral
Looks inside the band and holds down only what protrudes above the rest of it, which is a different aim from moving the whole band together. FOCUS runs from broad to sharp-peaks-only; SOFT lets short sounds through and catches what is sustained.
DELTA
Hear only what a band's dynamics are changing. It exists to answer how much the effect is actually doing, which is the question a depth control never answers on its own.
Mid/Side, per band
Stereo, Mid, Side, Left or Right, chosen band by band rather than for the whole instance.
Surround to 32 channels
On a surround bus each band also gets a Speakers choice — 12 groups from All Speakers to LFE, Centre, Wide, Top Front and Top Rear. Speakers decides which outputs a band reaches; Channel decides how it is treated within them.
14-day full-featured trial
One-time purchase, no subscription. The license is an offline .gbc file: no account, no node-lock, no telemetry, and no internet connection at any point.
Everything is on the curve.
24 bands, eight shapes, and dynamics that open in the dock under whichever band you are working on.
Threshold, depth, attack and release in the dock.
FOCUS narrows what counts as a peak.
Lifts what falls below the threshold.
Formats & platforms
| Format | macOS | Windows |
|---|---|---|
| VST3 | Yes | Yes |
| Audio Unit (AU) | Yes | — |
| CLAP | Yes | Yes |
| AAX Native | Yes | — |
AAX is built for macOS only. On Windows the installer ships VST3 and CLAP.
Specifications
| Processing latency — Native | None |
| Processing latency — Analog | 6.7 ms |
| Processing latency — Perceptual / Linear | Set by FIR Length: 85 ms at 8k, 683 ms at 64k (the default), 2.73 s at 256k |
| Spectral dynamics | Adds 85 ms when engaged |
| Bands | 24, each with its own shape, channel and dynamics |
| Frequency / gain / Q | 10 Hz – 30 kHz · ±30 dB · Q 0.1 – 40 |
| Channel formats | Mono, stereo, and surround up to 32 channels |
Phase mode, FIR Length and whether Spectral is engaged each change the latency, and changing any of them during playback rebuilds the host's delay compensation.
System requirements
| macOS | Windows | |
|---|---|---|
| OS version | macOS 12.0 Monterey or later | Windows 10 version 1607 or later, 64-bit |
| CPU | Apple Silicon or Intel (Universal binary) | 64-bit Intel or AMD |
Try Causa.
Full-featured for 14 days, no card required.
$129 $65Intro offer one-time purchase. Your license file is emailed the moment payment completes.