👄 McGurk Effect

Pick a heard syllable and a seen mouth shape independently, then press Play. Mismatch them the classic way — audio "ba" against a visual "ga" — to reproduce the illusion.

Audio syllable (heard)

Visual viseme (seen mouth shape)

Playback mode

What you should perceive

Choose a combination and press Play.

Readouts

Audio syllable

Visual viseme

Mode

Both

Status

Idle

Honesty note: the audio here is a stylized synthesized tone/noise burst, not a recording of a real voice, and the mouth is a simplified procedural rig, not real facial video. The illusion this page demonstrates was originally shown with real filmed speech (McGurk & MacDonald, 1976); this demo illustrates the underlying audio-visual integration principle, not a validated experimental stimulus.

Stylized illustration — not real speech

3D procedural mouth/jaw rig · morphs between three viseme targets · Web Audio synthesized syllables