SpinSynth: 3D Synthesizer

Spin the shape, hear the sound move. A free synth with no ads and no account. Ultra, a one-time purchase, adds four shapes, the sequencer, the arpeggiator and recording.

SpinSynth is a new kind of synthesizer: spin the 3D shape and its motion modulates the sound in real time. Flick it: it spins, slows down, and the filter, resonance or any other parameter follow along. You play the sound as much as the notes.

HOW IT WORKS • Every corner of the shape drives a synth parameter, on the axis you choose (X, Y or Z) • The shape follows your finger precisely, then spins freely with real inertia, slowed by friction • Lock it and friction is gone: the shape spins forever and the sound breathes on its own • Active points swell with what they control, and the slider they drive takes on their color: you see what you hear • One Square is 8 corners × 3 axes: 24 modulations offset by geometry, like a bank of LFOs, from a single gesture

A REAL SYNTH ENGINE A monophonic virtual analog architecture, built for sound: • 3 anti-aliased oscillators (sine, triangle, saw, square), 32' to 2' • Oscillator sync, FM and ring modulation, noise generator • Oversampled 24 dB ladder filter, 4 modes (24 and 12 dB low-pass, band-pass, high-pass), resonance up to self-oscillation • Overdrive into the filter, two ADSR envelopes, glide, keyboard tracking • Tempo-synced ping-pong delay, stereo reverb

PLAY, EXPLORE, KEEP • Synth keyboard with pitch bend: slide your finger down to bend the note, as far as an octave below • The dice: one tap, a brand-new sound, new assignments, and the shape takes off again • Sound bank: 30+ sounds in five families (bass, synth, lead, pads, FX) • Save your sounds and setups, export them to share • The app picks up right where you left off • A built-in guide to get started with synthesis, jargon-free

ULTRA: ONE-TIME PURCHASE, NO SUBSCRIPTION SpinSynth is a free synthesizer: the Square and the whole sound engine are included. Ultra unlocks: • Four more shapes: the Slab, which tumbles on its own, the Triangle, the Round, and the Ball, which rolls as you tilt your iPhone • Two shapes at once, each with its own physics: one locked to the tempo while the other tumbles • Revolution sync: the spin locked to the tempo, from a sixteenth note to four bars, with zero drift • Step sequencer, 16 to 32 steps, with slides • Arpeggiator: 7 chords, 5 patterns, up to 5 octaves, hold • Chaos mode: the assignments rewire themselves while you play • Recording: REC, countdown, STOP, and your take as a WAV file, saved to the Files app or shared

WHO IS IT FOR? For making electronic music: sound design, ambient, techno, synthwave, acid basslines, evolving pads. For beginners: the dice and the sound bank make it sing from the very first second, and every control is explained. For anyone who just wants to play: spin it, listen.

No ads, no account. Neon interface, synthwave landscape. For the best sound, wear headphones (over Bluetooth, some latency is unavoidable).

Designed and built in France by Eemzeek Studio, an independent studio. An idea, a bug? Write to us from the app menu.