ThereminAir: Theremin Synth

ThereminAir turns your Apple Watch into a theremin — the legendary instrument you play without ever touching it.

Anchor your elbow and sweep your forearm like the hand of a clock: raise it and the pitch rises, lower it and the pitch falls. Rotate your wrist to swell the volume. There are no buttons to press while you play, no strings, no keys — just the motion of your arm in the air, exactly like the real thing.
Your arm becomes the antenna.

HOW IT WORKS
• Sweep your forearm for pitch — glide smoothly or lock to musical notes
• Rotate your wrist for volume — from a whisper to full voice
• Wobble your wrist on a held note and it sings with real vibrato
• Turn the Digital Crown to set your maximum volume
• Watch the live readout — frequency, note name, and a scrolling trace of your vibrato

PLAY IN KEY
Pure mode gives you the classic continuous theremin glide. Prefer to stay in tune? Choose a scale and every note snaps to it:
• Major and Minor
• Major and Minor Pentatonic
• Pick any root note
Vibrato sings around the note you land on, so playing in key never sounds locked to a grid.

MAKE IT YOURS
• Three pitch ranges — Precise for playing in tune, Standard for everyday play, Wide for drama
• Three vibrato depths — Subtle, Natural, Wide
• The tone brightens as you play louder, the way an acoustic instrument does
• Plays the right way round on either wrist, in either crown orientation
• Vibrato-only mode, so travelling to a new note stays clean

RECOMMENDED SETTINGS
Precise range · Pure scale · Dynamic timbre on · Wide vibrato depth · Vibrato only on · Travel-proof vibrato off · Exclusive audio off

TAP AND PLAY
Add the ThereminAir complication to your watch face and a single tap launches you straight into play mode — no menus, no waiting. Or just say "Hey Siri, play ThereminAir".

BUILT FOR THE WATCH
• Smooth, low-latency synthesis tuned for Apple Watch
• Clean, glanceable interface
• Works on the go — your instrument is always on your wrist

Whether you're making eerie sci-fi sweeps, practicing pitch, or just playing with sound while you wait for coffee, ThereminAir puts a real instrument on your wrist.