Roland - E-4 | Voice Tweaker

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.

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

T-8
Beat Machine

Create infectious tracks in seconds flat with a miniature rhythm factory powered by pristine TR drums plus bass from the inimitable TB-303.
INFO

J-6
Chord Synth

Pairing a powerful chord sequencer with the lavish tones of the legendary JUNO-60, this portable synth toolbox has the building blocks you need to bring harmonic substance to your jams.
INFO

P-6
Creative Sampler

Sample and perform anywhere with sophisticated granular sound design options, advanced sequencing tools, and hands-on MFX.
INFO

S-1
Tweak Synth

Divine a new world of sonic textures with a potent micro polysynth and sound design playground inspired by the legendary SH-101.
INFO

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

Video Library

AIRA Compact Overview

Fun, go-everywhere instruments that put Roland’s legendary creative magic in the palm of your hand.

Vocal Harmonizer History: Effects Processors, Vocoders, and More

Learn the origin story of vocal harmonizers and processors and explore the science behind creating vocal harmonies with music technology.Read more…

Getting to Know AIRA Compact: E-4 Voice Tweaker

The E-4 is a vocalist toolbox with auto-pitch functionality, harmony, vocoder, and looper. Learn to use this flexible, portable instrument.Read more…

Getting to Know AIRA Compact: P-6 Creative Sampler

The P-6 is a compact sampler capable of a wide range of sample processing and compositional techniques. Learn to use this flexible, portable instrument.Read more…

Getting to Know AIRA Compact: An Introduction

The AIRA Compact line is Roland’s most portable to date. Here’s an introduction to the individual members of the family.Read more…

Getting to Know AIRA Compact: The Basics

The AIRA Compact line is Roland's most portable to date. Learn the key skills needed to get started with this powerful instrument series.Read more…

Downloads

Updates & Drivers

E-4 System Program ( Ver.1.03 )

Support

If you have questions about operating your Roland product, please check our Knowledge Base for answers to the most common questions.
You can also contact our Product Support through Roland Backstage.
In addition, we have a library of Owner’s Manuals and Support Documents that you can download and reference.

AIRA COMPACT

E-4 VOICE TWEAKER
A vocalist’s best friend.