New in v2.2.0 Every output, a sound of its own

FluidEQ

Free & open source

Better sound is only the beginning.

Name: FluidEQ
Availability: InStock
Author: Ivan Carmenates Garcia

Get more from your headphones with correction profiles, precise EQ and powerful DSP. Share audio between computers and play through multiple outputs at once—each with its own EQ, DSP rack and sound profile that you can adjust independently.

Play your music, sing karaoke, and bring your desktop to life with music-reactive visualizers and animated wallpapers. All in one app.

Download free

The complete app is free and open source. No subscription. No account needed to get started. See the visualizers

Windows Available now .exe · 199 MB
macOS Beta available .dmg · Apple silicon
Linux Beta available AppImage · .deb

Windows 10 & 11 v2.2.0 GPL-3.0-or-later Unsigned installer 199 MB

FluidEQ in motion

Watch the current demo first, then explore every workspace in order.
Parametric bands and live response

Up to 128 bands per output, each with its own filter, over the live spectrum and the combined response.
The DSP rack, stage by stage

Each stage from Normalizer to Master opens to its own controls — here the Normalizer, with input and output readings and before/after meters.
Your music, by album

Open an album to its songs, and keep Up Next in view while it plays.
Online Media, inside FluidEQ

YouTube, YouTube Music, Bandcamp, Twitch and Suno, played inside FluidEQ with the same EQ and DSP.
Karaoke, with a pitch lane

Timed lyrics set large, UltraStar syllables and pitch, and a lane that shows your voice against the melody.
Visualizers, made for your music

Scenes by FluidEQ and its community move with your music, in the app and behind your desktop.
The Studio

Describe a scene, paste FluidEQ's prompt into your own AI assistant, and watch it play on your music as the files are saved.
Dynamic Lighting, following the scene

Keyboard, mouse, mousepad, headset and stand take the colors of the scene on the graph.

New in v2.2.0

2.2 Every output, a sound of its own

Headphones and speakers each keep their own EQ, preset, DSP rack and Room. Tune each ear on its own, soften a voice’s sharp S, share sound both ways across a whole group of computers, and keep the scenes you love for good.

EACH OUTPUT REMEMBERS

Every output keeps its own sound

Headphones and speakers, each tuned its own way

ONE BAND, TWO EARS

Tune each ear on its own

Left + right in the band’s own menu

A SOFTER S

A De-esser in the DSP rack

Sharp S sounds down, cymbals left alone

THE NEW PLAYER

One player. Every color.

The compact player is all new: one column, with the visualizer glowing behind the song, the transport right under it, your EQ’s own bands, and Up next beside your playlists. Drop music anywhere on it to queue it. Turn the Tint and it takes your color — the keys, the faders, the seek bar and the song that’s playing — and with Colorful mode on, every fader gets a color of its own.

The compact player with its analyzer behind fictional song artwork, transport controls, a ten-band EQ and Up Next. — The compact player follows your window colors. Click the deck, or swipe, to explore.

The compact player follows your window colors. Click the deck, or swipe, to explore.

Visualizers

Scenes are yours for good

Create your own scenes for free in the Studio, or explore the optional gallery. One credit keeps a gallery scene on your graph, desktop and lights, with every update its maker publishes. Preview any scene for 10 seconds first.

FluidEQ Engine 1.24

A new engine comes with it

2.1 brings FluidEQ Engine 1.24, which plays each ear’s own bands and the De-esser, and shows Live leveling’s output loudness. FluidEQ offers the update after it starts, with one Windows prompt; until then everything else plays as before.

Also in 2.1

EVERY PC, BOTH WAYS

Share audio between your computers

Hear every computer in the group, whichever one you sit at
THE EQ, IN NUMBERS

Every band’s numbers, right on the graph

Labels on the curve, EQ mode beside it
CURVES OF YOUR OWN

Your own list of curves, beside OPRA’s

Keep, name and reuse your own curves
A SOUND FOR EVERY SONG

Songs that remember how you like them

Tune a song once, hear it that way every time
MAKE A SCENE BY ASKING

Ask for a change, watch it on the stage

A chat beside the Studio’s stage

Read all 18 changes →

What FluidEQ does

Everything you hear, shaped your way.

An EQ for every app, a DSP rack, a player, karaoke, and visualizers that move with your music. Swipe through what FluidEQ does.

All 38, in detail →

Your first five minutes

First steps with FluidEQ

Start with a familiar song at a comfortable volume. The left rail switches FluidEQ on and holds the preamp; the center is your workspace; the right rail follows your output and its profiles. The bar at the foot of the window controls whatever is playing.

Visualizers FluidEQ

Watch the music move.

The visualizers are living scenes drawn on your graphics card. These are running in your browser right now, to the song from the demo video — the same scenes, through the same scene contract the app runs them in.

Playing to the demo song

Page colours

How to get scenes

The gallery

Try FluidEQ’s own visualizers. Many more are coming.

The four above are from FluidEQ’s official collection, and new ones are on the way. Members make scenes of their own in the Studio and publish them, so the gallery keeps growing with its community — browse it by most liked, this week or newest.

Official scenes Made by members

Nature
Cities
Space
Water
Fire and light
Retro games
Animals
Abstract
3D worlds

Highlighted: the categories playing above.

A gallery of scenes, ready for your music.

Browse them in Visualizers → Gallery, watch any scene for 10 seconds with a free account, and keep the ones you like for one credit each.

The window can take a visualizer’s colors or its light, and some bring birds, petals or stars that drift gently around the app — what this page is doing now.

The gallery of FluidEQ and community visualizers, with scene previews and category filters.

The short version of the terms.

A scene is yours for goodOne credit each, from packs you pay for once on Stripe. Nothing renews, and FluidEQ never sees your card.
The equaliser, the rack and the players stay freeFluidEQ keeps working offline and without an account, as it always has. The Studio and publishing are free too.
You choose what is sharedNothing you make leaves your computer unless you export or publish it.
Never your musicFluidEQ’s service never receives your audio, your track names or your EQ.
RefundsCredits you have not spent are refunded within 14 days of buying them: write to support@fluideq.com. A credit spent on a scene is final, and the scene stays yours.

Scenes are bought inside FluidEQ

Download FluidEQ — it is free
Sign in from Account in the actions menu
Open a scene in Visualizers → Gallery and press Get: one credit keeps it for good. A confirmed account gets 3 credits free.

Download free for Windows Any account can watch every scene for 10 seconds first.

Visualizers See it in motion

A tour of the visualizers

Everything in the Visualizers tab, in four and a half minutes: the gallery, the Studio from an idea to a published scene, Dynamic lighting and the desktop visualizer.

Visualizers Make it with your AI

Build your own visualizer with your AI.

The Studio turns a description into a visualizer. Your own AI assistant writes the scene in a project folder, and FluidEQ plays each version on your music the moment it is saved. The Studio is free for every account.

New project…

Give it a name. FluidEQ makes its folder, with a scene that already moves.
Describe your scene

What it shows, and what moves with the beat, the bass or the treble. A photo of yours can come alive too.
Copy AI prompt

It tells your AI how FluidEQ scenes are made, with your idea at the end. Every file it saves plays on the stage right away.

Any assistant that works on files: Claude, Cursor, Codex, Copilot. With a chat instead, save the files it gives you in this folder.
Publish…

Anyone signed in can find it in Visualizers and watch it for 10 seconds, and one credit keeps it in their looks for good.

Studio

Make scenes with your AI and watch them live

ProjectYour projects, and FluidEQ scenes to look inside.
StageThe scene, playing on your music. Double-click for full screen.
What it hears nowWhat the scene receives: level, beat, bass, mids, treble.
Preview audioTest signals that drive only this preview.
CodeThe scene’s code, live, updated as your AI saves it.
Publish…Publish it to the gallery for everyone

Free for every account Make, publish and share as many scenes as you like. No card. Nothing to buy.
Published: plays free for you A scene you publish plays free for you everywhere once it is approved. Every two members who get it with a paid credit earn you a credit, for somebody else’s scene or one of FluidEQ’s.
Copy the AI prompt and your AI assistant can see your scene and hear how the song moves.
Scenes can be real 3D worlds that step on the kick and leap at the drop.

Download free for Windows

How to start Open Visualizers and choose Studio in its rail.

The FluidEQ Engine

Your EQ, on everything you hear.

FluidEQ’s own audio engine runs inside Windows’ audio service, after your sound card’s effects — so games, browsers and streaming apps all pass through your EQ and the whole DSP rack, and the maker’s panel keeps working.

Every appGames, browsers, streaming, calls

WindowsAudio serviceOne engine for the whole PC

KeptSound card effectsThe maker’s panel still works

FluidEQ Engine The DSP rack, then your EQ

Normalizer
Denoise
De-esser
Exciter
Bass Forge
Equaliser
Bass Punch
Room
Dimension
Maximizer
Master
EQ

OutYour headphones or speakers

No rebootSetup asks which engine you want. Switching later takes one Windows permission and a few seconds of silence while audio restarts.

Leveled, repaired, protectedThe Normalizer levels live audio song by song and remembers the songs it has heard, Denoise repairs hiss, hum and clicks as they play, and Auto normalize guards the output with a true-peak limiter.

Your sound comes back when FluidEQ goesQuitting from the tray takes the EQ and the rack off every output. If FluidEQ is ended or crashes, your sound is normally restored on its own.

FluidEQ Engine Recommended

Your sound card’s own effects and panel keep working
EQ and the DSP rack apply to everything, no restart
Custom APO commands, Peace and VST plugins do not run

Equalizer APO

Custom commands, Peace, VST plugins
Takes over your sound card’s effect slot; vendor panels can lose controls
DSP rack works in Library playback only. Separate setup, Windows restarts.

Switch any time from the actions menu. Updating FluidEQ keeps the engine you already have.

2audio engines
11DSP stages
128bands per output
6,229headphone models
28free styles
12languages
0accounts needed to use it

Features

Six workspaces, one listening system

Online Media, EQ, DSP, Library and Karaoke share one transport, one volume and one clear signal story. EQ keeps its bands, headphone corrections, presets and convolution together; under the FluidEQ Engine the DSP rack works on every app.

Online Media

Online video with the live response underneath

Play online video inside FluidEQ while the response graph and the live spectrum stay in view, and one player at a time keeps Library, Karaoke and Online Media from talking over each other.

1active player at a time

Online Media — Online video with the live response underneath

EQ

Up to 128 bands, every filter type

Headphone corrections from 6,229 models, convolution and your own bands, each a layer with its own switch and strength, under a preset that sets the whole chain in one pick. Also: EQ mode, band designs, and switching a band off without losing it. Find your headphones

128bands per output

DSP

A rack of 11 stages for everything you hear

Normalizer, Denoise, De-esser, Exciter, Bass Forge, Equaliser, Bass Punch, Dimension, Room, Maximizer and Master. Under the FluidEQ Engine the rack works on everything you hear; under Equalizer APO, on FluidEQ’s own player.

117DSP EQ presets

DSP — A rack of 11 stages for everything you hear

Library

Your own music, played in the app

Browse by album, artist, song or video, and turn whatever you are looking at into the queue. The next song starts even while FluidEQ is minimized, and its taskbar button carries Previous, Play/Pause and Next.

5ways to browse

Library — Your own music, played in the app

Karaoke

Timed lyrics, multilingual sheets, pitch lane and chords

Timed lyrics, a pitch lane and estimated chords in the player; the Karaoke Maker splits a song into voice and backing and lines the lyrics up on your machine.

3lyric formats

Karaoke — Timed lyrics, multilingual sheets, pitch lane and chords

Visualizers

Living scenes that move with your music

Living scenes drawn on your graphics card, where the bass, the beat and the treble each move something different. One searchable picker holds the free styles and the scenes, and the window can take a scene’s colors or its light.

3parts of the music each scene follows

Visualizers — Living scenes that move with your music

No virtual audio device, no telemetry, and no account needed to use it.

All 38, in detail

Portrait of Ivan Carmenates Garcia, the developer behind FluidEQ — **Ivan Carmenates Garcia** Developer · father · still shipping

FluidEQ is star 01 in my galaxy. See the rest ivancosoftware.com

The person behind FluidEQ

Built between bedtime and the next idea.

I’m Ivan Carmenates Garcia. I belong to the in-between era: old enough to have written Z80 machine language by hand, young enough to still ship software today.

01

The first machine

My father traveled across provinces to find his kid a better computer. That machine opened a door I never stopped walking through.
02

Closer to the metal

MSX-era BASIC led to hand-written Z80 code, then to a lifetime of asking how complex software could feel clear and immediate.
03

Still shipping

Today I’m a developer, a father of two, and the person building FluidEQ. The quiet hours after family time are when filters are tuned, bugs are chased, and the next workspace takes shape.

One coffee is roughly one late night of building. It helps keep FluidEQ free, local, maintained, and moving forward.

Support my work Find me on LinkedIn

A hidden reward

Find the beat. Keep the spectrum.

Tap the pet on the beat. In FluidEQ the game hears the percussion in your own audio; here, reach ×10 and this page turns colorful too.

In FluidEQ itself, Colorful mode is one click away in the What’s new tour — no ×10 required.

What actually changes

Every EQ band drops its single teal and takes its own color, and each slider pulses with what that band is hearing.
The response curve thickens and its glow becomes the spectrum. The selected handle swells with the level under it.
The title-bar meter grows taller and starts drawing at your screen’s full refresh rate instead of the thirty it is capped to otherwise — the wave gets visibly smoother.
Menus, About and What’s new pick up the same sweep, so the color is not just on one screen.
The pet gets a spinning aura, and the moment you reach it two rings go out across the whole window.
Nothing behind text is tinted. The color lives on edges and on things that were already moving, so the app stays readable.
Ctrl+E turns it off and on from then on, and reduced motion keeps the color while holding it still.

FluidEQ / v2.2.0

The complete app. Completely free.

Your EQ, audio engines, DSP rack, players and creative tools are free to download and use. No subscription, no paid app edition.

FluidEQWindows 10 & 11

$0free, GPL-3.0-or-later

Both engines: the FluidEQ Engine or Equalizer APO
EQ, headphone corrections, convolution and the 11-stage DSP rack
Library, Karaoke and the Karaoke Maker, Online Media and Share Audio
Styles for the graph, with Auto switching
The Studio: create and publish your own visualizer scenes for free

Download free for Windows

Want a different look? Extra gallery scenes are optional and use credits, with 3 free for a confirmed account. The app and the Studio stay free. About scenes and credits →

Better sound is only the beginning.

Every output keeps its own sound

Tune each ear on its own

A De-esser in the DSP rack

One player. Every color.

Scenes are yours for good

A new engine comes with it

Also in 2.1

Share audio between your computers

Every band’s numbers, right on the graph

Your own list of curves, beside OPRA’s

Songs that remember how you like them

Ask for a change, watch it on the stage

Try FluidEQ’s own visualizers. Many more are coming.

A gallery of scenes, ready for your music.

Describe a scene. Watch it come alive.

A visualizer behind your desktop icons.

Your desk lights up with the scene.

The short version of the terms.

New project…

Describe your scene

Copy AI prompt

Publish…

Make scenes with your AI and watch them live

FluidEQ Engine Recommended

Equalizer APO

Online Media

EQ

DSP

Library

Karaoke

Visualizers

Built between bedtime and the next idea.

The first machine

Closer to the metal

Still shipping

Find the beat. Keep the spectrum.

What actually changes