SJ-SQUARE - Synthesizer

Super Jupiter-inspired poly synth. Multi-OSC, filter, ENV, unison, delay & scales — play on keys or MIDI.

SJ-SQUARE is a Super Jupiter–inspired analog polyphonic synthesizer for iPhone.

A warm brown chassis and amber glow meet a hands-on module layout: oscillators, filter, envelopes, LFO, and effects — built for playing, not menus.

FEATURES • Multi-oscillator panel with wave, octave, and level controls • Filter with resonance, envelope intensity, and key tracking • Filter envelope & amp controls for expressive shaping • LFO, OSC 2 detune / live layer, chorus, delay, and reverb • Unison (1–4 voices), tempo / tap, and scale snap • Full on-screen keyboard with octave shift & range minimap • MIDI input support for external controllers • Built-in presets ready to play • Landscape-optimized performance UI

Craft rich pads, biting leads, and stacked unison tones. Tweak cutoff and envelopes in real time, then perform with the keyboard or your MIDI gear.

From the maker of KG-SQUARE, JP-SQUARE, and DX-SQUARE — hardware-inspired synth apps for musicians who love hands-on sound design.