Editing Electro-Theremin (section)

== Similar instruments ==
* A [[musical saw]], also called a singing saw, is the application of a hand saw as a musical instrument, played with a [[bow (music)|bow]]. The sound creates an ethereal tone, very similar to the theremin. The musical saw is classified as a friction idiophone with direct friction (131.22) under the [[Hornbostel-Sachs]] system of musical instrument classification.
* The [[Ondes-Martenot]], 1928, which uses the principle of heterodyning oscillators, but has a keyboard as well as a slide controller and is touched while playing.<ref>{{cite web|url=http://www.thomasbloch.net/en_ondes-martenot.html|title=ONDES MARTENOT **** THOMAS BLOCH – the instrument : videos, pictures, works, facts...|last=Bloch|first=Thomas|author-link=Thomas Bloch|access-date=11 March 2010}}</ref>
*[[Trautonium]], a monophonic electronic musical instrument by Friedrich Trautwein, invented in 1929
* The [[Electronde]], invented in 1929 by Martin Taubman, has an antenna for pitch control, a handheld switch for [[articulation (music)|articulation]] and a foot pedal for volume control.<ref>[http://www.britishpathe.com/record.php?id=11280 Taubman demonstrates his Electronde. Stills and a downloadable video at British Pathe news archive]. 1938-12-12.</ref>
* The [[MC-505]] by Roland, using the integrated [[D-Beam]]-sensor, sounds like a Theremin.
* The [[Haken Continuum]] Fingerboard uses a continuous, flat playing surface along which the player slides his fingers to create the desired pitch and timbre values. It is described as "a continuous pitch controller that resembles a keyboard, but has no keys."
* The [[Persephone (musical instrument)|Persephone]], an analogue fingerboard synthesizer with CV and MIDI, inspired by the [[trautonium]]. The Persephone allows continuous variation of the frequency range from 1 to 10 octaves. The ribbon is pressure and position sensitive. 
* The [[Therevox]] ET series of instruments are modern Electro-Theremins, while the ET-4 is based on the Ondes-Martenot.
* [[Audiocubes]] by Percussa are light-emitting "smart blocks" with four sensors, one on each side (optical theremin). The sensors measure the distance to the hands to control an effect or sound.<ref>{{cite web| title = Create Optical Theremin using Percussa AudioCubes| url = http://land.percussa.com/create-optical-theremin-using-audiocubes/| url-status = dead| archive-url = https://web.archive.org/web/20121014200447/http://land.percussa.com/create-optical-theremin-using-audiocubes/| archive-date = 2012-10-14}}</ref>
* The [[Otamatone]] by the Cube Works company, which is played by sliding the fingers up and down a stem to control a three-level pitch sound.