Spectra

The most complete system-wide DSP for macOS.

Now in public beta. Join the founders program for free access

Live spectrum analyzeriPhone-mic room correctionReference profiles for your headphonesUnlocked parametric EQDynamic EQ at any volumeSub Bass ExtensionPrism:X StageFlat, Harman & custom targetsCorrects every app, system-wideLive spectrum analyzeriPhone-mic room correctionReference profiles for your headphonesUnlocked parametric EQDynamic EQ at any volumeSub Bass ExtensionPrism:X StageFlat, Harman & custom targetsCorrects every app, system-wide

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byPrism:

However you listen

Perfect sound on the gear you already own.

Studio monitors, desktop speakers, a favorite pair of headphones. Spectra corrects how each one actually sounds, room and all for speakers, model by model for headphones, in real time. Same Mac, same gear, finally dialed in.

Premium Studio Monitors, a desk monitors setup running Spectra

Your Everyday Speaker, a everyday speakers setup running Spectra

All Headphones, a headphones setup running Spectra

System-wide · 64-bit float

Prism:System audio engineLive

Tuned forPremium Studio Monitors

What Prism:X does here

Corrects room issues, preserves clarity, and improves the trouble frequencies a speaker manufacturer could never account for.

Room correction

The room is part of the speaker.

Walls, your desk, where you sit. It all reshapes the sound before it reaches you. Spectra measures what’s actually arriving through the mic in your pocket, then corrects the room back out of the signal.

In-room frequency responseStudio Desk · measured with iPhone · Harman target

CorrectedRaw in-roomTarget curve

Measured by iPhone

Spectra knows every iPhone mic’s response and corrects for it, so your phone reads like a reference mic.

250 Hz – 16 kHz · about 60 seconds

Adaptive correction

Correction starts wide and narrows band by band, re-checking the result against your target after each pass.

Resolves down to 1/12 octave

0SCORE

Graded results

Every run ends with a confidence score and per-band deviation, so you can see how close the room landed to your target.

±1.4 dB average deviation

Mic-response correctedHardware-safe limitsRe-run anytime

Your EQ

Now make it yours.

Calibration got you to flat: accurate, neutral, the room out of the way. That’s the foundation, not the finish. Tuning is where you color it back in with more warmth, more air, a little more low end, shaped to your ears. Start from a preset, or grab any band and move it.

Your EQ

Band 3 · 1.00 kHz · 0.0 dB · Q 0.9

Custom · yours

Flat, the calibrated foundationYours, the curve you shape on top

Effects

Then shape it further.

Optional color, layered on top of your curve. Each one is safe to leave on.

Tone Macro

Warmer or brighter, in one move.

A single macro tilts the whole response along the spectrum, from cozy and warm to open and bright, without touching individual bands.

One warm ↔ bright control
Rides on top of your EQ

WarmerBrighter

Under the hood

Everything under the hood.

You’ve seen the highlights. Here’s the rest of what Spectra gives you.

Live analyzerSee the correction liveiPhone-mic calibrationPer-model mic correctionHeadphone reference profilesFlat · Harman · custom targets250 Hz–16 kHz focusAdaptive broad→narrow solverConfidence scorePer-band deviationCalibration strengthUnlocked parametric EQBuilt-in EQ presetsPeak / null markersSub-bass roll-offTest tonesBefore / after chartsWarmer ↔ brighterDynamic EQ at any volumeSub Bass ExtensionPrism:X Stage64-bit float · system-wideHardware-safe limiting

Pricing

Start free. Upgrade when you want more.

Spectra Free is a real system-wide EQ, free with an account. Base adds parametric control and Discover presets; Pro unlocks every control. The audio-tap foundation is open source.

CoreAudioTapKit

Freeopen source

The open-source audio-tap foundation.

Tap & route any app’s audio, system-wide
The plumbing Spectra is built on
Headless: bring your own DSP & UI
Build & modify freely
Prism:X engine & the app

View on GitHub

FreeStart here

Freewith an account

A real system-wide EQ for your whole Mac.

System-wide 10-band graphic EQ
Tone macro, warm to bright
Six built-in presets
Discover community presets
Parametric EQ, analyzer & per-device

Download free

Base

$59one-time

Studio-grade sound, the easy way.

Everything in Free, plus:

Prism:X correction engine
Room correction with your iPhone mic
5-band parametric EQ
Live spectrum analyzer
Premium effects: Dynamic EQ, Sub Bass Extension, Prism:X Stage
Switch outputs, and each keeps its own setup
Apply Discover presets, verified and measured for your headphones
Unlimited bands & full manual control
Bass management & configurable test tones

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Get Base

ProRefine your sound

$11.99/month

Every control, unlocked.

First week free. Everything in Base, plus:

Unlocked parametric EQ: unlimited bands, Q 0.1 to 10
Calibration targets with strength and range control
Confidence scoring and per-band statistics
Configurable test tones
Bass management: crossover, roll-off, output limit
Advanced parameters on every effect
Save your own presets, and enroll to become a verified Discover publisher
Early access to new builds before they ship