Roland Aura E-4 Voice Tweaker

A vocalist’s best friend.

Standard Features

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

https://static.roland.com/products/aira_compact/images/e-4_inspiring.jpg

https://static.roland.com/products/aira_compact/images/e-4_perform_with_sound.jpg

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Inspiring Roland vocal processing.

The E-4 combines powerful voice transformer tools and standard vocal effects with a tactile interface that’s meant to be played. This lean, mean machine puts a treasure trove of top-quality processing in a go-everywhere gadget that’s endlessly enjoyable and amazingly affordable.

Perform with sound.

By working the E-4’s inviting panel, you can go from traditional vocal enhancements to punchy beatboxed grooves to striking alien soundscapes—all in a single performance. Select different sonic shapers, trigger looper controls, cycle through Scatter effects, and tweak pitch, formant, and more in the flow.

Harmonic explorer.

Take your singing to the next level with automatic harmony effects. Set the key and chord voicing on the fly and bring head-turning flair to any song. And with Auto Pitch, you can dial in everything from subtle tuning fixes to the hard-tuned sounds heard in mainstream pop tracks.

https://static.roland.com/products/aira_compact/images/e-4_scatter.jpg

https://static.roland.com/products/aira_compact/images/e-4_channel_robot.gif

https://static.roland.com/products/aira_compact/images/e-4_link_up_and_go.jpg

Loop and Scatter.

Turn one voice into an entire orchestra using the 24-second looper. Overdub layer after layer with the E-4's effects to create wild, vocal-driven rides. Then slice and dice with the expressive Scatter knob, which chops your sound into colorful bits that you control with a twist.

Channel your inner robot.

Use direct-access tools to instantly change your vocal gender, conjure sounds from outer space, or transform yourself into a mechanical persona (good or evil is up to you). There’s also a powerful vocoder, which you can drive from a large pool of onboard synth waveforms, the E-4’s pitch functions, or an external MIDI keyboard for an endless variety of textures.

Link up and go.

Connect a handheld mic to the front input for performing, or use a gaming headset or the inline mic on your earbuds to bring fresh vocal fun to your next livestream or podcast. Sync with other AIRA Compacts like the T-8 Beat Machine and J-6 Chord Synthesizer to expand your range. Or interface with computer DAWS, mobile music apps, and hardware instruments via USB-C or MIDI.

https://static.roland.com/products/aira_compact/images/e-4_everwyhere_at_once.jpg

https://static.roland.com/products/aira_compact/images/j-6_meet_the_gang.jpg

Everywhere at once.

The E-4 creatively accentuates vocals anytime and anywhere. The lithium-ion battery provides up to 3.5 hours of power per charge, and the rugged Roland build will support inspired magic and mayhem for a long, long time.

AIRA COMPACT

Meet the gang

Specifications
Effect Type: AUTO PITCH
HARMONY
VOCODER
PITCH
FORMANT
SCATTER
REVERB
DELAY
ECHO
CHORUS
LOOPER
Maximum Recording Time: Approximately 24 seconds
Display: 7 segments, 4 characters (LED)
Connectors: SYNC (IN, OUT) jacks: Miniature phone type
MIX (IN, OUT) / HEADSET jacks: Stereo miniature phone type (Stereo, CTIA)
MIDI (IN, OUT) jacks: Stereo miniature phone type
MIC IN jack: Stereo phone type
USB port: USB Type-C® (Audio, MIDI)
Power Supply: Rechargeable lithium-ion battery
Obtained via USB port (USB bus power)
Current Draw: 500 mA
Expected battery life under continuous use: Approx. 3.5 hours
* These figures will vary depending on the actual conditions of use.
Expected battery charging time: Approx. 3 hours
* To charge the unit, use the USB port of a computer or a commercially available USB power supply adaptor (5 V, 500 mA or higher).
Accessories: Leaflet ”Read Me First”
USB Type-C to USB Type-A cable
Size and Weight
Width: 188 mm
7-7/16 inches
Depth: 106.5 mm
4-1/4 inches
Height: 41.7 mm
1-11/16 inches
Weight (including batteries): 290 g
11 oz



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Inspiring Roland vocal processing. The E-4 combines powerful voice transformer tools and standard vocal effects with a tactile interface that’s meant to be played. This lean, mean machine puts a treasure trove of top-quality processing in a go-everywhere gadget that’s endlessly enjoyable and amazingly affordable.	Perform with sound. By working the E-4’s inviting panel, you can go from traditional vocal enhancements to punchy beatboxed grooves to striking alien soundscapes—all in a single performance. Select different sonic shapers, trigger looper controls, cycle through Scatter effects, and tweak pitch, formant, and more in the flow.	Harmonic explorer. Take your singing to the next level with automatic harmony effects. Set the key and chord voicing on the fly and bring head-turning flair to any song. And with Auto Pitch, you can dial in everything from subtle tuning fixes to the hard-tuned sounds heard in mainstream pop tracks.


Loop and Scatter. Turn one voice into an entire orchestra using the 24-second looper. Overdub layer after layer with the E-4's effects to create wild, vocal-driven rides. Then slice and dice with the expressive Scatter knob, which chops your sound into colorful bits that you control with a twist.	Channel your inner robot. Use direct-access tools to instantly change your vocal gender, conjure sounds from outer space, or transform yourself into a mechanical persona (good or evil is up to you). There’s also a powerful vocoder, which you can drive from a large pool of onboard synth waveforms, the E-4’s pitch functions, or an external MIDI keyboard for an endless variety of textures.	Link up and go. Connect a handheld mic to the front input for performing, or use a gaming headset or the inline mic on your earbuds to bring fresh vocal fun to your next livestream or podcast. Sync with other AIRA Compacts like the T-8 Beat Machine and J-6 Chord Synthesizer to expand your range. Or interface with computer DAWS, mobile music apps, and hardware instruments via USB-C or MIDI.


Everywhere at once. The E-4 creatively accentuates vocals anytime and anywhere. The lithium-ion battery provides up to 3.5 hours of power per charge, and the rugged Roland build will support inspired magic and mayhem for a long, long time.		AIRA COMPACT Meet the gang