In Gyro Mode, Available on Phones, Tilting the Device Left-right Sets Volume, While Forward-back Movement Controls Pitch

Air Theremin is a browser-based musical instrument that lets you play a theremin in mid-air by waving your hands at a webcam or tilting a phone. The tool offers two primary control methods: hand tracking and gyroscope-based motion. With the hands mode, users wave both hands at the camera — spreading them apart controls volume, raising them adjusts pitch, leaning back softens the tone, and pressing palms together silences the sound.

A laptop webcam works as well as a phone camera. In gyro mode, available on phones, tilting the device left-right sets volume, while forward-back movement controls pitch.