Demon Voice Changer

A deep, growling, rumbling voice for Halloween clips, game characters and scary stories, from your own recording in a few seconds.

1. Your voice

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Plays your changed voice live for as long as this tab stays open, for example into a virtual audio cable for Discord. Nothing is recorded.

Live listening runs about 45 ms behind your voice, plus your device's own output delay. Recordings stay in this tab, with the microphone's raw sound (no automatic volume or noise filtering), so you can try every voice on the same take.

2. Pick a voice

Fine-tune: pitch, formant, echo, reverb, distortion, volume

This page opens with a Demon voice built on the Monster preset: pitch −8 semitones, formants −5, 45% distortion, a 30 Hz ring modulator and a dark reverb. Record a line or upload a clip, and it plays back as something that shouldn’t be talking.

How the demon is built

  • Pitch −8: eight semitones down puts even a deep voice well below the normal speaking range, around the bottom notes of a bass singer.
  • Formants −5: the resonances drop by a quarter, which suggests a throat and chest far bigger than a person’s. Keeping them less shifted than the pitch keeps the words understandable.
  • Distortion: the growl. Clipping the waveform adds rough overtones, like a voice straining.
  • Ring modulation at 30 Hz: the signal is multiplied by a slow tone, which splits it into two slightly detuned copies. At 30 Hz you hear it as a trembling, unstable rumble rather than a metallic ring.
  • Reverb: a medium dark room, so the voice seems to come from somewhere around you rather than out of a speaker.

Performance tips

Speak slowly and lower than your normal voice: the effect exaggerates what you give it. Breathy, drawn-out words and a slight rasp work well; laughing is especially effective. Whispering turns into a hiss, so give it a full voice. Keep the microphone a hand’s width from your mouth to avoid pops.

Variations

Under Fine-tune: raise Reverb to 50% for a cathedral, drop the Pitch to −10 for something enormous, or lower Distortion for a smoother, more menacing voice. Compare with Monster, Deep and Cave on the same recording by clicking them.

The settings on this page

pitch -8 · formant -5 · distortion 45% · ring 30 Hz · reverb 30%. Every setting can be changed under Fine-tune; the page only chooses where it starts.

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