Description
The E-4 is a portable vocal processor that harmonizes, auto-pitches, vocodes, loops, and glitches your voice using intuitive faders and buttons for live or studio use. Add high-quality reverb, delay, chorus, and dynamic harmonies, or layer sounds with the 24-second looper to create rich, evolving vocal textures. Scatter effects and pitch/formant sliders allow real-time manipulation of robotic, futuristic, or subtle tones to shape your performance. Connect via USB-C, MIDI, and sync I/O to DAWs, mobile devices, or other AIRA gear for seamless integration. Powered by a built-in lithium-ion battery, it provides up to 3.5 hours of uninterrupted creative play. Rugged and compact, the E-4 delivers versatile vocal processing anytime, anywhere, making it ideal for stage, studio, or streaming applications.


Vocal Effects Powerhouse
Harmonize, auto-pitch, vocode, loop, and glitch your vocals or any audio source. Intuitive buttons and faders let you manipulate effects live or in the studio. Perfect for both creative experimentation and polished performances.


Expressive Performance Tools
Shape pitch, formant, and style in real time with tactile controls. Add rhythmic Scatter effects and trigger looped layers for dynamic performances. Instantly transform static vocals into engaging, evolving textures.


Built-In Looper & Vocoder
Record up to 24 seconds of audio and overdub unlimited layers for complex arrangements. Use the Scatter knob to slice and rearrange sounds creatively. The vocoder allows robotic, alien, or harmonized textures from onboard synths or MIDI input.


Portable & Connected
Compact design with a built-in lithium-ion battery gives up to 3.5 hours of use anywhere. Connect via USB-C, MIDI, or sync I/O for seamless integration with DAWs, apps, or other AIRA devices. Durable construction ensures reliability for gigs, streaming, or studio work.
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
Panel Type: MicroLED
USB I/O: 1 x USB-C Female Input/Output
Audio I/O:
1x 1/4″ TS Mic Input
1x 1/8″ / 3.5 mm TRS Mic Input
1x 1/8″ / 3.5 mm TRS Headphone Output
Battery Chemistry: Lithium-Ion
Battery Capacity: 500 mAh
Recharge Time: 3 Hours
Maximum Battery Life: 3.5 Hours
DC Input Power: 5 VDC
Operating Current: 500 mA
Dimensions: 7.4 x 4.19 x 1.64″ / 18.8 x 10.65 x 4.17 cm
Weight: 10.2 oz / 290 g














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