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EF202 Theremorph Optical Theremin - Image 1

EF202 Theremorph Optical Theremin

DesktopHybridMonophonic

$259

Imagine waving your hand through the air to bend tones like a classic theremin, but with a modern hybrid synth engine that packs real punch under the hood. The Theremorph brings that optical magic to life through a pair of infrared sensors—one for pitch, one for volume—letting you morph sounds contactlessly while diving deep into subtractive synthesis.

Its digitally controlled oscillator delivers stable tones with analog wave shaping for rich harmonics, feeding into a classic transistor ladder lowpass filter that you can sweep smoothly. A single envelope shapes your attacks and decays, while an LFO adds rhythmic pulse, all tied together with a flexible mod matrix for creative routing. Controls are straightforward with knobs for filter cutoff, resonance, envelope amount, LFO rate, and more, plus full MIDI in/out and CV/Gate I/O for integrating into rigs—control it externally or use it as a controller. The compact desktop chassis measures just 7.38" x 4.7" x 2.05", available in black, white, or red, and runs on a dedicated 9VDC center-positive supply; a web app lets you tweak deeper parameters wirelessly.

Players love how it nails eerie, expressive leads and textures that stand out in ambient or experimental patches, blending vintage theremin vibe with reliable hybrid performance—though some note the mono output keeps it focused rather than expansive. At this size and price, it's a gem for tinkerers wanting optical control without the fuss.

Released

Unknown

Status

In Production

Synthesizer
Format
Desktop, Experimental
Type
Subtractive
Internal Battery
No
Voice
A/D
Hybrid
Polyphony
Monophonic
Oscillators
1
Oscillator Type
DCO (Digitally Controlled)
Voices
1
Filter
Lowpass, Ladder
Envelopes
1
LFO
1
Effects
No
Expression
Aftertouch
No
Velocity
No
MPE
No
Additional
Optical theremin, DCO, web app configuration, CV/Gate I/O, 9V power
Software
web app
I/O
Audio In
-
Audio Out
mono
Headphone
0
MIDI
In, Out
MIDI Type
-
Ports
CV/Gate
Wi-Fi
No
Workflow
Arpeggiator
No
Sequencer
No
Mod Matrix
Yes
Memory
No
Measurements
Dimensions
7.38" x 4.7" x 2.05"
Weight
-
Last updated Feb 25, 2026