HandSynth: Gesture Synth

HandSynth turns your hands into an instrument. Stand your phone up, step back and play chords in the air while the front camera follows your hands.

How it works

- Your left hand picks the chord: one finger for the first chord of the key, two for the second, up to an open hand

- Horns (index and pinky) and horns with the thumb give the last two chords, and a fist is silence

- Turn your left hand over and major becomes minor

- Your right hand shapes the sound: raise it for louder, lower it for softer, tilt it for a brighter or darker tone

- Show one to four fingers on the right hand for fuller chords with sevenths and ninths

- Stick your right thumb out for an octave lower, and pinch to start an arpeggio

Features

- Free play with a live chord bar for the key you choose

- Learning mode with famous chord progressions and classics like Ode to Joy, Canon in D, Silent Night and Greensleeves

- Practice that waits for each chord, and Play that keeps the beat with a band and scores every change with stars and combos

- Three tempos for every song

- Loops: record up to four tracks with your hands over drums and bass

- Set the tempo or tap it, mute and solo tracks, and export your loop as a WAV file

- Theremin: the height of your right hand is the pitch, your left hand the volume, glide freely or snap to the scale

- Clips with your camera picture, the glowing hand skeleton, the chord names and the sound, in portrait or landscape, to save or share

- A glowing neon chord trail that flows across the camera picture: it changes height and color with every chord and ripples as loud as you play, in your clips too

- Light skin smoothing you can adjust or turn off

- Arpeggios up, down or up and down, in eighths, sixteenths or triplets, over one or two octaves

- Smooth voice leading: chords change without clicks

- 11 synthesised sounds plus piano and acoustic guitar

- Reverb and echo

- 14 scales and modes in all 12 keys, or your own chord set for every gesture

- Chord tiles you point at with your finger or tap

- One-hand mode and left-handed mode

- Hand calibration in a few seconds

- A gesture cheat sheet one tap away

- A guided first lesson with five short steps

- Portrait and landscape

- Light and dark theme

- Polish and English chord names

Stand your phone up and play your first chord in the air.