Realtime audio processing
in your browser for free
Plug in your guitar, bass, keys or microphone and play through a complete digital signal processor. No drivers, no DAW, no plugins, no licences, no account. Just start rocking.
Start playing, freeAll in one
One digital processor. Everything in it.
62 effects that would otherwise fill a pedalboard. Tap Original to hear the plain recording, then tap an effect: it switches over while it plays, so you hear exactly what changes.
Drive and grit
From a warm, singing overdrive to a snarling wall of fuzz and the heavy, scooped chug of 90s nu-metal: the sound of the rock records you grew up with.
Cab simulator, Amp tone stack, Bitcrusher, and more…Space and echo
Put your sound in a cathedral, a canyon or a dream. Echoes that answer you, reverb that shimmers like a choir, delays that play backwards.
Reverb, Tape echo, Freeze, and more…Movement
Make it swirl, sway and pulse: the lush wobble of an 80s chorus, a jet plane’s whoosh, the spinning speaker of an old organ, the talking wah of funk, a trance-gate stutter.
Tremolo, Uni-vibe, Vowel filter, and more…Octaves, organ and whammy
Play one guitar and sound like three: a bass and a bell under every note, a rock organ that holds every chord, or bend the whole thing an octave up and back down like a whammy pedal.
12-string, Bass synth, Sub octave, and more…Pitch and voice
Sing higher than you can, turn your voice into a robot choir, snap every note into tune like a pop record, or sound like a 1930s radio.
Harmonizer, Formant shift, Doubler, and more…Plus everything that makes it sound finished: an amp tone stack and speaker cabinet, EQ, compressors, and clean-up that removes hum, hiss and noise. And for more than guitar: a real wooden body for a violin or an acoustic on a pickup, a whole string section, a 12-string, a synth you play with your bass or your breath, and a second voice that sings harmony with you.
See all 62 effects
Amp and tone 10
Movement 12
Pitch and voice 13
Stack them in any order, and drag them around while you play.
Plug in. Play.
Playing through a computer shouldn't be a project.
Every time you want to plug an instrument into a computer, it turns into a project. FreeDSP skips all of it: open the page and you're playing.
Plug in
Into your laptop's or phone's input, or any USB audio interface. Guitar pickups get their tone restored automatically.
Open FreeDSP
In any modern browser. It sets your level for you and learns your hiss and hum to remove them.
Play
Stack effects, drag them into order, and hear every change instantly, while you keep playing.
Wherever you play
Your whole rig, in one tab.
No pedalboard to carry, nothing to install on a borrowed machine. The same processor on your laptop, tablet and phone, and your setup is still there next time.
On the road
A laptop or a phone and a cable. Practise in a hotel room, warm up backstage.
On stage
Realtime on the audio thread, stereo, sample-accurate. The native apps go down to about 12 ms.
At home
Plug straight into your computer, see what you play on the scope and spectrum, and dial in your sound.
Open formulas
The actual processing, right at your fingertips.
Every effect is a few lines of maths you can read. Open one, change it, and hear the difference while you keep playing.
Change any effect
Open the formula behind any effect and rework how it sounds. Its sliders keep their settings.
Make your own
Start from a blank effect and write it from scratch. Every #param line becomes a slider.
Copy the whole chain
Your entire chain is plain text. Copy it, paste it into another browser or device, or share it with your band.
Native apps
Want it tighter? Go native.
The browser version is free, with every effect: up to five at a time, an hour at a stretch. But a browser can only get so close to your audio hardware. When every millisecond counts, on stage or in the studio, the FreeDSP app talks to your hardware directly.
In the browser
≈ 40 msEvery effect, free, five at a time. Great for practising, trying sounds and jamming at home.
In the app
≈ 12 msDirect access to your audio hardware, so it feels as immediate as a pedal. Same effects, same screen.
The apps for Windows, Linux, Android and iPhone are coming soon. See what the app adds
Your sound stays yours.
Everything runs on your own device. Nothing is recorded or uploaded, there is no account, and there are no ads or trackers. Privacy policy
Start playing, free