Free GLaDOS Voice Changer

A free calm, synthetic AI voice in the style of GLaDOS.

Before and after

Free GLaDOS voice changer

Make GLaDOS say anything with AI

Your browser will ask for microphone access when you click.

More versions

Variation: Robot buzz at 25%: less person left in the machine.
Variation: Reverb 3 s at 30%: the voice filling an empty test chamber.

Use it in calls and on recordings

Try it here
Press Start mic above and talk. You hear this voice with the exact settings on this page, and every slider can be moved.
Use it live
Press Use this voice in calls, then pick Facecam Virtual Mic as the microphone in Discord, Google Meet, Zoom or any other call that runs in Chrome.
Put it on a recording
Open Online Voice Changer, record or upload a file, choose the same settings and download the result.

More about this voice

The parts of a synthetic voice

Part	Setting	What you hear
Register	Pitch +5, Tone +2	A high, light voice with a small resonance
Sweep	Flanger 0.08 times a second, 50% mix	A slow metallic phase moving through every sentence
Synthetic tone	Robot 220 Hz, 12% mix; bit crusher 12-bit, 25% mix	A faint pitched ring and digital grain
Clean top	Treble +2 dB above 4 kHz, bass cut below 200 Hz	Bright, thin and clinical
Facility	Reverb 15%, 1.6 s	A loudspeaker in a large empty room

You supply the stepped melody

The original jumps between fixed notes mid-sentence, and these effects don't add that. Imitate it: hold each phrase on one note, then hop to a different note for the next, with no slide between.
Stay calm and pleasant throughout. The insult is in the words, never in the tone.
Put an odd lift on a word that doesn't deserve it, like a speech synthesizer misjudging the stress.
Keep an even pace with no audible breaths; pause only at full stops.

Where a passive-aggressive AI is useful

It suits anything that needs a polite, cutting announcer: stream alerts read aloud, a game master running a puzzle room for friends, tutorial and speedrun narration made with the Online Voice Changer. For a voice filling an empty test chamber, the third clip sets the reverb to 3 seconds at 30%; keep that for single announcements, not conversation. The second clip raises the robot tone to 25% and leaves less person in the machine.

The exact settings

Setting	Value
Noise gate	mutes the mic below -50 dB, between words
Pitch	+5 (higher)
Tone	+2 (sounds smaller)
Robot	220 Hz buzz, 12% mix
Bit crusher	12-bit, 25% mix
Flanger	wobbles 0.08 times a second, 50% mix
Bass cut	below 200 Hz
Treble	+2 dB above 4 kHz
Reverb	15% mix, 1.6 s long

Free GLaDOS voice changer FAQ

Is this the actual GLaDOS voice from Portal?

No. It's an approximation made with pitch, a flanger and a ring modulator, using no game audio.

Why doesn't it have the sing-song steps?

Those come from snapping pitch to fixed notes, which these effects don't do. Speak in level tones and jump between them yourself.

Can I use the GLaDOS voice in Discord?

On discord.com in Chrome, yes: select Facecam Virtual Mic as your input. Switch off Discord's noise suppression so the 1.6-second reverb isn't trimmed.