Roland E-4 AIRA Compacts Voice Tweaker

Divine a new world of sound with the S-1 Tweak Synthesizer, a potent micro polysynth inspired by the legendary Roland SH-101. Jam with the snappy basses and expressive leads you’ve loved for years. Then launch your music into uncharted territory with futuristic wave manipulation, onboard sequencing, and unique performance features designed for modern creators. With its inspiring hands-on controls and intuitive workflow, the powerful S-1 delivers a fun and satisfying experience for beginners and serious synth adventurers alike.

Standard Features

Ultra-portable polysynth inspired by the legendary SH-101
Authentic SH-101 sound driven by Roland’s evolving Analog Circuit Behavior (ACB) technology
Craft all-new tones with powerful oscillator drawing, oscillator chop, and riser tools
Mono, poly, unison, and chord modes and four-voice polyphony
Square, sawtooth, sub, and noise oscillators
Hands-on panel with familiar synth controls for instant sound shaping and live performance tweaks
Onboard keyboard with two-plus octave range
64-step sequencer and 64 patterns for on-the-spot song creation
Advanced programming tools, including motion recording, probability, sub step, last step, and velocity
Easy-to-use arpeggiator with eight phrase types
D-Motion feature for controlling pitch, mod, and other parameters by physically moving the S-1
Color and process your sounds with a variety of delay, reverb, and chorus effects
Comprehensive connectivity with audio, MIDI, and sync I/O plus AIRA Link
Class-compliant USB-C audio/MIDI interface—no drivers needed
Lithium-ion battery with up to 4.5 hours of operation per charge
Sturdy construction and high-quality rubber pads
Connect to other AIRA Compacts and standard MIDI devices with optional BOSS TRS MIDI cables