The E-4 Voice Tweaker puts an entire vocal studio in your hands, combining harmonising, auto-pitch, vocoding, looping, and glitch effects in one compact, battery-powered unit that's built for hands-on performance. This powerful voice processor offers everything from subtle vocal enhancements to punchy beatboxed grooves and otherworldly soundscapes, all controlled through an intuitive interface designed to be played in real-time. With direct-access controls for pitch and formant manipulation, you can instantly change vocal gender, create mechanical personas, or conjure alien textures on the fly.
The unit's advanced vocal processing includes automatic harmony effects with on-the-fly key and chord voicing, plus Auto Pitch that ranges from gentle tuning corrections to the hard-tuned sounds of mainstream pop. A comprehensive vocoder can be driven by onboard synth waveforms, the E-4's pitch functions, or external MIDI keyboards for endless textural possibilities. The 24-second looper allows unlimited overdubbing to build complex vocal arrangements, while the expressive Scatter knob chops your sound into rhythmic fragments controlled with a simple twist.
Connectivity options are extensive, with support for handheld mics, gaming headsets, or earbud inline mics, plus comprehensive audio, MIDI, and sync I/O including AIRA Link compatibility. The E-4 integrates seamlessly with other AIRA Compacts like the T-8 Beat Machine and J-6 Chord Synthesizer, and functions as a class-compliant USB-C audio/MIDI interface for computer DAWs and mobile apps. With its lithium-ion battery providing up to 3.5 hours of operation and rugged Roland construction, this vocal performance tool is ready for studio work, live performance, or creative experimentation anywhere inspiration strikes.
- Vocal performance tool with powerful voice transformer effects
- Instantly shape the sound with pitch and formant sliders
- Advanced vocal effects including Auto Pitch, harmony, and vocoder
- Dial up unique rhythmic effects with the Scatter knob
- Process the sound output with high-quality reverb, echo, tempo delay, and chorus effects
- Low-cut filter and noise gate to eliminate unwanted sounds
- 24-second looper with unlimited overdubbing, undo/redo, and automatic BPM detection
- Supports external MIDI control of pitch, harmony, and vocoder functions
- 1/4-inch mic input with wide-ranging gain control
- Headphones output with support for an inline mic
- 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 3.5 hours of operation per charge
- Sturdy construction and robust controls
- Connect to other AIRA Compacts and standard MIDI devices with optional BOSS TRS MIDI cables