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Roland E-4 Voice Tweaker

  • £175.00
  • (FREE UK Delivery)
Item in Stock   |   Usually dispatched within 24 hours

Roland's E-4 Voice Tweaker is an essential, affordable tool for any creative live vocalist. Take your voice to new heights using a variety of premium effects, an integrated looper and transformative vocal functions and add excitement and dynamism to any show. 


Key Features 

  • Vocal performance unit equipped with voice transforming effects 
  • Use format and pitch sliders to tweak your sound 
  • Optional BOSS TRS MIDI cables allow you to hook up to any other AIRA Compact
  • Rugged construction and controls 
  • 3.5 hours of use per charge via the integrated lithium-ion battery 
  • Class-compliant MIDI and USB-C audio interface - no driver installation required 
  • MIDI, audio and sync I/O with additional AIRA Link 
  • Utilise the Scatter knob to conjure interesting percussive effects 
  • Harmony, vocoder and Auto Pitch vocal effects
  • Headphones output
  • Inline mic support 
  • 1/4-inch mic input (featuring a broad gain control)
  • Take charge of harmony, vocoder and pitch parameters via external MIDI control 
  • 24-second looper (offering instant BPM detection, undo/redo and unlimited overdubbing) 
  • Remove undesired sounds using a noise gate and low-cut filter 
  • Use techo, tempo delay, chorus and reverb to process your audio output 

Vocals on the Road  

The E-4 isn't just reserved for the stage. Thanks to 3.5 hours of run time on a single charge via an onboard lithium-ion battery, you can get experimenting whenever and wherever inspiration strikes! 

AIRA Compatibility 

Connect the E-4 to the J-6 Chord Synth or the T-8 Beat Machine for even more sonic scope. You can also hook up a headset, handheld mic, or use the inline mic on a pair of earphones to perform exactly how you like! USB-C and MIDI connectivity ensure that the E-4 can interface with apps, external hardware instruments and your favourite DAW too.


Dissect your sounds, cut it into slices, and tweak it all with a simple turn of the intuitive Scatter knob. Or, why not apply layers of your voice via overdubbed effects and loop it with the 24-second looper.

Vocal Soundscapes

By harnessing the in-built arsenal of trigger looper controls, sonic shapers and Scatter effects - alongside format, pitch and other alterable settings - you can transform your voice in either futuristic, or more traditional ways. For example, why not add some robotic flair, or change the gender of your vocal entirely!

That's not all; instant harmony effects, such as chord and key voicing changes, plus Auto Pitch let you craft a vocal sound influenced by the greatest modern day chart music. 


Effect Type


Maximum Recording Time

  • Approximately 24 seconds


  • 7 segments, 4 characters (LED)


  • 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).


  • 188 (W) x 106.5 (D) x 41.7 (H) mm
  • 7-7/16 (W) x 4-1/4 (D) x 1-11/16 (H) inches

Weight (including batteries)

  • 290 g
  • 11 oz


  • Leaflet ”Read Me First”
  • USB Type-C to USB Type-A cable

Online Delivery Charges:


UK Mainland, Ireland and Northern Ireland standard delivery is £5 for orders under £50 and free of charge for all orders over £50.
UK Mainland, Ireland and Northern Ireland next working day delivery is £10. Depending on weight and size of item. (Monday to Friday only) 

For next working day delivery . Order must be placed before 1.30pm (depending on size and weight of item, maybe delayed)

Saturday delivery occurs extra charges. Please call 02890 327357 for prices before placing your order.

Scottish islands and off shore deliveries may occur extra costs. (Please call 02890 327357 for prices before placing your order)

Rest of Europe delivery is flat rate starting rate of £30.00. Depending on weight and size of item.

Click And Collect Orders:

Please bring valid photo ID when collecting all click and collect orders.

Returns - Online Sales only

Unsuitable products may be returned (they must be unopened & unused) within 14 days of our despatch date (Applies to delivered items only). Please include your original receipt in the returned parcel, and please also state the reason for the return. Items ordered in error or if you have changed your mind the item will incur a 10% restocking charge less delivery costs and customers must pay for any carriage return costs incurred. Any orders to be returned must be sent back with a valid RMA number (obtained by phoning us on +442890 327357

All Media and software/serial key related items can not be exchanged or returned.

Products packed in Blister Packs (sealed plastic), cannot be returned if the blister pack has been opened.

Consumable items can not be returned once opened and used:

Wearable items including Earphones/Headphones/Microphones due to hygiene reasons.  Can not be returned if opened and used.

The product you return must be in new / unused condition with all the original packaging and all instruction manuals. We do not accept any item with any indication that it was used. In such cases, We will contact the buyer to arrange collection from ourselves. If you wish to receive a refund we will re-credit the original purchaser's credit card / Paypal  for the sum paid less any taxes and duties and less the postal costs.

It is advisable to send returned items by registered insured post/Courier  and keep your proof of postage certificate, as we cannot be responsible for goods lost or damaged in transit. Please note that postal costs for returned goods are the customer’s responsibility and will be reimbursed by us only in the case of damaged, faulty or incorrectly supplied goods. If you receive a product in error from us that is faulty you must advise us within three days from receipt of the goods.

Customers' statutory rights are unaffected.

When you have a valid RMA number. Please send all returns to:

Electronic Centre
16 College Square East
Belfast BT1 6DE UK

Delivery Time Scale:

Our standard free online delivery is usually a 2-6 working days, Depending on size and weight, Also buyers location. You have the option at checkout to pay for next working day. (Please note on rare occasions the next working day service can take longer)

When paying using our finance the above also applies, and we must deliver the goods to same address as Billing address  within 14 days of the agreement.

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