Free Evil Robot Voice Changer

A free deep, buzzing, distorted voice for a hostile machine.

Before and after

Free evil robot voice changer

Your browser will ask for microphone access when you click.

More versions

Variation: With a 2.5-second reverb: addressing the last humans.
Variation: 5-bit crusher at 80%: the logic core failing.

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

Three kinds of harshness, stacked

Part	Setting	What you hear
Mass	Pitch -6, Tone -3	A heavy low voice from a large chassis
Buzz	Robot 40 Hz, 60% mix	A rattling growl that swallows more than half the voice
Overload	Distortion 0.4, 50% mix	Clipped, angry peaks
Grit	Bit crusher 10-bit, 50% mix	Coarse digital noise on every syllable

Make it cold, not loud

Speak evenly with no emotion at all. The effects already sound angry, and a calm delivery under them is more unsettling.
Use declarations: what will happen, in how long, and that it cannot be stopped.
Separate words slightly. With buzz, distortion and crusher together, run-on speech becomes noise.
Drop your own pitch at the end of each sentence so the 40 Hz rattle is the last thing heard.

Scenes that suit a hostile machine

The antagonist of a sci-fi tabletop campaign or roleplay server, a few lines per scene.
Boss lines in fan animations and game mods, recorded with the Online Voice Changer.
Stream bits: a takeover, a countdown, a forfeit for a lost bet.
Speeches: the second clip adds a 2.5-second reverb at 25%, a machine addressing the last humans. The third, a 5-bit crusher at 80%, is the logic core failing, for a defeat scene.

The exact settings

Setting	Value
Noise gate	mutes the mic below -50 dB, between words
Pitch	-6 (lower)
Tone	-3 (sounds bigger)
Robot	40 Hz buzz, 60% mix
Distortion	drive 0.4, 50% mix
Bit crusher	10-bit, 50% mix
Flanger	wobbles 0.15 times a second, 45% mix
Bass cut	below 150 Hz
Treble cut	above 7 kHz
Midrange	+3 dB around 1.2 kHz

Free evil robot voice changer FAQ

How is it different from the normal robot voice?

The Robot preset keeps your pitch and has no distortion. This version drops six steps, sets the buzz to 40 Hz at 60% and adds distortion, so it sounds large and hostile.

Can I use it in game voice chat?

Only through a browser. In-game chat and consoles don't list Facecam Virtual Mic, so talk to your team on discord.com in Chrome with that mic selected.