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The e-theremin with MIDI and audio out

e-ther 'Classic' : e-theremin with MIDI / audio

Sold by MIDI_IN

$95.35

No tax for United States [change]
Your e-ther can be fitted with a crystal clear or opaque white faceplate
Stock available: 2
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Original Design
This product was designed by MIDI_IN. By buying this product you support original hardware creators.

What is it?

This is played with gestures in the air like a theremin and can output:

  • MIDI over USB (now a USB-C socket)
  • MIDI over TRS (a TRS/5-pin DIN lead (type A/Korg) gives MIDI over 5-pin DIN)
  • audio (Now built-in and not an optional extra)

(see separate listing for e-ther 'Advance' with more features)

Why did you make it?

I would love a real Theremin and the idea of something pocket-sized and super versatile appealed to me. I thought this might be possible with distance sensors and yes - it works really well!

What makes it special?

e-ther's sensors don't use visible light and therefore aren't affected by changes in ambient light. They measure distance very accurately (invisible, eye-safe) making e-ther very predictable and consistent.

The MIDI output means that you can use it in a variety of scenarios - with electronic instruments or DAW. (It works beautifully with MIDISID). There is some configurability of the vertical control which can send expression or modwheel messages.

A demo of the 'Classic' version is on the Youtube channel: https://youtu.be/DfwjUPKlbCg

A manual at https://peacockmedia.software/e-ther/e-ther_3manual.pdf has more details.

The firmware will remain in developments and updates will be available to e-ther owners.

Links to code and documentation

Documentation (peacockmedia.software)

Shipping policy

Free shipping to UK.

For US, the import tariff is paid and your parcel will bear the PDDP logo to indicate that and should be waved through customs without delay or further charge.

For EU, VAT is collected at checkout for orders below 150 Euro and sent with an IOSS number.

I usually ship 6 days a week and usually next-day.

All parcels are sent with tracking.

Here are some extras that might be useful for your project!
An advancement of the e-ther Classic, it adds quantisation and a display

The seller

MIDI_IN

MIDI_IN logo

Eastville, Lincolnshire, UK
2 orders since May 3, 2026
Adventures in music, electronics and code