HETERODYNE
A musical instrument for Android and iOS

An instrument you play with your hand in the air

The front camera sees your palm: distance sets the pitch, moving left and right sets the volume. No wires, no sign-up.

First release — Google Play
SettingsHands detected: 1Inference latency: 21 msPitch: 399 Hz, Volume: 72%, Vibrato: 14%
How it works

Playable from the first minute

01

Show your palm to the camera

The app finds your hand in frame and starts sounding. Move your hand away and the sound fades out smoothly.

02

Farther is higher

Pitch depends on the distance between your hand and the camera. You can flip the direction in settings.

03

Right is louder

Volume changes as your hand moves left and right. A slight wobble becomes vibrato.

Tuning

Tune it to your hand

Pitch range110–880 Hz by default
Distance calibrationnear and far point
Vibratothreshold and depth
Timbreclean or vintage
SettingsPitch — by hand distance from the camera(closer/farther). Volume — by horizontalposition (left/right).Pitch (distance)Volume (left/right)SensitivityMin. frequency: 110 HzMax. frequency: 880 HzDirection: farther — higher pitchNear point (hand size): 0.300Far point (hand size): 0.080Left bound: 0.15Right bound: 0.85Louder on the rightNear and far points — how large your hand shouldappear in frame at close/far distance to hit theedges of the pitch range. A larger value meanscloser (bigger in frame).
Privacy

Your camera stays on your phone

Video is processed on-device only, in real time. Frames are never saved or sent anywhere.

Privacy Policy →
No sign-up or accounts
No ads or analytics
No servers — there's nowhere for data to go

Coming soon to Google Play and the App Store

Coming soon on Google PlayComing soon on the App Store