The E-4 Voice Tweaker is an outrageously jammable box of fun that harmonizes, auto-pitches, vocodes, loops, and glitches your voice and anything else you feed it. Flip through hands-on controls to manipulate the sound, and chain in AIRA Compacts and other electronic instruments and let them ride in perfect sync.

• 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
• ¼-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