Gesture Synth
What is Gesture Synth ?
GestureSynth.me is a free online gesture synthesizer that uses your webcam to turn hand movements into music in real time. Your left hand selects chord progressions while your right hand controls volume, timbre, filters, and octaves. It supports both Gesture chord mode and Theremin continuous pitch mode, and includes a four-track loop sequencer and song learning mode. All processing happens locally in your browser—no software installation, no account registration, and no video data is uploaded.
- Recording time：2026-08-12
- Is it free：
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(2026-07-01 - 2026-07-31)Website Latest Traffic Status
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Gesture Synth Core Features
Two-hand gesture music performance — Left hand selects chord progressions (I–VII) while the right hand controls volume, harmony type, filter timbre, and octave switching
Dual mode switching — Gesture mode for chord and harmony performance; Theremin mode for continuous pitch and slide playing
Four-track loop sequencer — Supports 30–300 BPM and multiple time signatures, allows recording and layering up to four tracks, and exporting as WAV audio files
Song learning mode — Provides step-by-step practice guidance for public-domain pieces such as 'Twinkle Twinkle Little Star', 'Ode to Joy', and 'Amazing Grace'
Local privacy protection — Camera feed is processed only within the browser, never uploaded to any server, no microphone permission required, and no account system
Gesture Synth Subscription Plan
FAQ from Gesture Synth
Is GestureSynth.me free? Do I need to create an account?
It is completely free, with no account creation, no subscription, and no payment information required. All features are available immediately, including two-hand gesture performance, Theremin mode, four-track sequencer, song learning mode, and audio export. There are no hidden fees or feature restrictions.
How do I play music with my hands? What does each hand control?
The left hand handles the harmonic foundation: extend 1–5 fingers to select chord degrees I–V, index finger plus pinky to select VI, add the thumb to select VII, and tilt your wrist to switch between major and minor. The right hand handles tonal expression: palm height controls volume, the number of fingers changes the harmony type (triad/inversion/seventh chord), wrist tilt adjusts the low-pass filter, and extending the thumb lowers the octave.
Does the website record or upload my webcam feed?
No. GestureSynth.me processes your webcam feed only locally in your browser for hand landmark detection. The feed is never stored as a recording and never uploaded to any server. Camera permissions are released immediately after the session ends, and the page only saves preferences (such as key and tutorial progress) in local localStorage.
Which browsers and devices are supported?
Chrome and Edge desktop versions are recommended for the best experience; Chrome on Android is also supported. Safari and iOS may use compatibility fallbacks. For optimal tracking, use soft front lighting, keep both hands within the frame, maintain about an arm's length from the camera, and choose a background that contrasts with your hands.
Can I save my performances?
Yes. Performances recorded with the four-track loop sequencer can be exported as WAV audio files (with automatic fallback to WebM format when the browser does not support offline audio rendering). Audio rendering and download are both completed locally, with no upload to any server.
What is the difference between Theremin mode and Gesture mode?
Gesture mode is suited for chord and harmony performance—your two hands work together to select chords and shape timbre, ideal for exploring chord progressions and recording structured loops. Theremin mode turns the page into a continuous pitch synthesizer: your right hand's vertical position controls pitch while your left hand's height controls volume, perfect for playing sliding melodies. The two modes can be switched at any time without restarting the camera.
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