The ‘Ekvodin’ Andrei Volodin, Russia, 1937

The Ekvodin was a pioneering electronic synthesiser designed by the Russian engineer Andrei Volodin with Kovalski Konstantin and Yevgeny Murzin (later to invent the ANS synthesiser). The first versions of the Ekvodin were home-built experimental models that eventually became successful commercial keyboard instruments, used extensively in Russia throughout the 1940′s until the 1950′s. The Ekvodin won gold medals at the 1958 World Fair in Brussels and the Exhibition of Achievements of the National Economy in Moscow. By the 1970s, Andrei Volodin was teaching musical acoustics and sound synthesis at the Moscow State Conservatory, continuing research and development of the Ekvodin synthesizer and a new polyphonic instrument that was never finished.

Andrei Volodin playing an early model of the Ekvodin

Andrei Volodin playing an early model of the Ekvodin

The instrument was controlled via a six and a half octave, velocity sensitive keyboard which allowed the player to add vibrato by applying sideways movement to the key, plus a foot controlled volume pedal was included to add expression. Sound was generated from vacuum tubes and passed through a number of pre-set filter banks and octave dividers that could be combined to a total of 660 settings. the Ekvodin “was capable of imitating almost any symphony orchestra instrument, including percussion”

Ekvodin Diagram

Ekvodin Diagram

“We give musicians throughout the world a unique opportunity to breathe new life into their emotional art. Ekvodin – a musical instrument that’s perfect for orchestra and ensemble, and solos with piano accompaniment. The keyboard of this instrument is literally capable of singing glamorous melodies to fill every home. Any modern composer is pleasantly surprised when he discovered that Ekvodin is capable of producing a wide range of musical timbres with an extraordinary clarity and purity of sound. Performers, conductors and teachers will be fully satisfied with the outstanding expressive possibilities. Ekvodin opens truly cosmic prospects for every musician. Developed and manufactured in the USSR. ”

Ekvodin Advertising

Ekvodin B9 1950's Model

Ekvodin B9 1950′s Model


the ‘Nivotone’ Alexei Voinov. Russia, 1931

The Nivotone optical reader

The Nivotone optical reader

The animator Nikolai Voinov (1900-1958), part of Arseney Avraamov‘s group ‘Multzvik’ in Moscow, 1931, started his own method of optical synthesis. Instead of drawing or printing to film Voinov cut wave forms from strips of paper which were then optically read by his machine the ‘Nivotone’ (‘Paper-Sound’) and translated into sound by a photo-electric process.

The Multzvuk group

Multzvuk group was formed in 1930 by Arseney Araazamov to conduct research into graphical sound techniques. The group was based at the Mosfilm Productions Company in Moscow (one of the leading film production companies in Moscow, renamed Gorki Film Studio in 1948) and consisted of composer and theoretician, Arseney Araamov, cameraman and draughtsmen  Nikolai Zhelynsky, animator Nikolai Voinov, painter and amateur acoustician Boris Yankovsky. In 1931 the group moved to ‘NIKFI’,  the Scientific Research Institute for Photography for Film. Moscow, and and was renamed the ‘Syntonfilm laboratory’. In 1932 NIKFI stopped funding the group who then moved to Mezhrabpomfilm and finally closed in 1934.

From 1930-34 more than 2000 meters of sound track were produced by the Multzvuk group, including the experimental films ‘Ornamental Animation’, ‘Marusia Otravilas’, ‘Chinese Tune’, ‘Organ Chords’, ‘Untertonikum, Prelude’, ‘Piruet’, ‘Staccato Studies’, ‘Dancing Etude’ and ‘Flute Study’. The Multzvuk archive was kept for many years at Avraamov’s apartment, but destroyed in 1937.


Electrified Voices: Medial, Socio-Historical and Cultural Aspects of Voice …edited by Dmitri Zakharine, Nils Meise

‘Graphical Soundtrack’ Arseney Avraamov, Russia, 1930

Arseny Avraamov in Moscow 1923. (Russian: Арсений Михайлович Авраамов), (born Krasnokutsky [Краснокутский], 1886 died Moscow, 1944)

Arseny Avraamov in Moscow 1923. (Russian: Арсений Михайлович Авраамов), (born Krasnokutsky [Краснокутский], 1886 died Moscow, 1944)

Arseny Mikhailovich Avraamov was an avant-garde Russian composer and theorist. He studied at the music school of the Moscow Philharmonic Society and when the first would war broke out he refused to join the army and fled the country working, among other things, as a circus artist. Avraamov returned during the revolution of 1917 where he pioneered optical synthesis techniques and developed his own  “Ultrachromatic” 48-tone micro tonal system ( “The Universal System of Tones,” 1927) but is probably best know for his “Simfoniya gudkov” or ‘symphony of sirens’ (November 7, 1922, Baku USSR) which involved navy ship sirens and whistles, bus and car horns, factory sirens, cannons, the foghorns of the entire Soviet flotilla of the Caspian Sea, artillery guns, machine guns, seaplanes, a specially designed “whistle main,” and renderings of Internationale and Marseillaise by a mass band and choir.

Avraamov's hand drawn audio waves

Avraamov’s hand drawn audio waves

Avraamov invented the first graphical soundtrack technique which involved hand-drawing geometrical representations of sound shapes and then repeatedly printing these shapes onto the audio-optical strip on a cine-film. This technique was later developed by Yevgeny Sholpo, Boris Yankovsky amongst others (including  Daphne Oram some thirty years later in England)

“By knowing the way to record the most complex sound textures by means of a phonograph, after analysis of the curve structure of the sound groove, directing the needle of the resonating membrane, one can create synthetically any, even most fantastic sound by  making a groove with a proper structure of shape and depth”.

From ‘Upcoming Science of Music and the New Era in the History of Music’ by Avraamov, 1916.


“Composer Arseny Avraamov at the scientific-research institute conducts the interesting experiments on a creation of the hand-drawn music. Instead of common sound recording on film by means of microphone and photocell, he simply draws on paper geometrical figures, then photographing them on sound track of the filmstrip. Afterwards this filmstrip is played as a common movie by means of film projector. Being read by photocell, amplified and monitored by loudspeaker, this filmstrip turns out to contain a well-known musical recording, while its timbre is impossible to relate to any existing musical instrument.
Comrade Avraamov conducts now a study in recording of more complicated geometrical figures. For instance, to record graphical representations of the simplest algebraic equations, to draw molecular orbits of some chemical elements. In this research composer is assisted by a group of young employee of the Research Institute for Film and Photo. By the end of December Avraamov will finish his new work and to show it to the film-community. Quite possibly the listening of the abstracts of “Hand Drawn Music” will be organized in radio broadcast”
(Kino 1931)

The Multzvuk group

Multzvuk group was formed in 1930 by Arseney Araazamov to conduct research into graphical sound techniques. The group was based at the Mosfilm Productions Company in Moscow (one of the leading film production companies in Moscow, renamed Gorki Film Studio in 1948) and consisted of composer and theoretician, Arseney Araamov, cameraman and draughtsmen  Nikolai Zhelynsky, animator Nikolai Voinov, painter and amateur acoustician Boris Yankovsky. In 1931 the group moved to ‘NIKFI’,  the Scientific Research Institute for Photography for Film. Moscow, and and was renamed the ‘Syntonfilm laboratory’. In 1932 NIKFI stopped funding the group who then moved to Mezhrabpomfilm and finally closed in 1934.

From 1930-34 more than 2000 meters of sound track were produced by the Multzvuk group, including the experimental films ‘Ornamental Animation’, ‘Marusia Otravilas’, ‘Chinese Tune’, ‘Organ Chords’, ‘Untertonikum, Prelude’, ‘Piruet’, ‘Staccato Studies’, ‘Dancing Etude’ and ‘Flute Study’. The Multzvuk archive was kept for many years at Avraamov’s apartment, but destroyed in 1937.


Avraamov, Ars. “Sinteticheskaya muzika” Sovetskaya Muzika , 1939, No.8, pp. 67-75

“Sound In Z: Experiments In Sound And Electronic Music In Early 20th Century Russia,”  Andrei Smirnov, Koening Books, ISBN 987-3-86560-706-5

‘Avant Garde composers of the USSR during the 1920′s’ Alexandra Martin

the ‘Warbo Formant Orgel’, Harald Bode & Christian Warnke, Germany, 1937

the Warbo Formant Orgel

The Warbo Formant Orgel

Harald Bode’s first commercial design was the wonderfully named ” Warbo Formant Orgel” built while at the Heinrich-Hertz Institut für Schwingungsforschung at the Technische Hochschule in Berlin. The Warbo Formant Orgel was designed and built with the musical input from the composer and band-leader Christian Warnke (hence ‘War- Bo’  Warnke/Bode);

“Christian made the contribution of a musician — that means he told me what to do as far as all the features the instrument should have. I’ll have to go into more detail. Christian Warnke was a composer and musician, a bandleader with a fine ear for music, and he was an excellent violinist. He wasn’t involved in the design per se, just the specifications of the Warbo. And he sponsored the project on a minimum budget. Mind you this was in the second part of the 30s, which had still terrible after-effects of the depression. But the Warbo was my first major contribution in the field.”
Harald Bode in  SYNE magazine 1980
Description of the Formant operation of the Warbo Formant Orgel

Description of the Formant operation of the Warbo Formant Orgel

Two versions of the instrument were made and later stored at the  Heinrich-Hertz Institute in Berlin. The institute was completely destroyed during the war and with it the Warbo Formant Orgel. No recording of the Warbo Formant have been found. As with many other instruments designed by Bode the ‘Warbo Formant Orgel’ pioneered aspects of electronics that became standard in later instruments. The Warbo Formant Orgel was a partially polyphonic four-voice keyboard instrument with 2 filters and key assigned dynamic envelope wave shaping – features that were later used on the postwar ‘Melodium’ and  ‘Melochord’.

“… It [The Warbo Formant Orgel] was built with a relaxation type of oscillator. Four oscillators actually, that were selected for the 44-note keyboard. The major problem being the stability of the oscillators, which is critical when comparing one with the other, especially with four. So I dropped the idea of a four-note organ at that time and went on to the Melodium, which was created in 1938 and used in many large performances with the Berlin Philharmonic as a solo instrument. It was also used in some significant motion pictures of that era.”
Harald Bode in  SYNE magazine 1980

Biographical notes

Harald Bode; October 19, 1909 Hamburg Germany – January 15, 1987 New York USA.

Harald Bode; October 19, 1909 Hamburg Germany – January 15, 1987 New York USA.

Bode Studied  mathematics, physics and natural philosophy at Hamburg University, graduating in 1934. In 1937, with funding support provided by the composer and band-leader, Christian Warnke, Bode produced his first instrument the ‘Warbo-Formant Orgel’ (‘Warbo’ being a combination of the names Warnke and Bode). Bode moved to Berlin in 1938 to complete a postgraduate course at the Heinrich Hertz Institute where he collaborated with Oskar Vierling and Fekko von Ompteda. During this period Bode developed the ‘Melodium’ ;  a unique monophonic touch-sensitive, multi-timbral instrument used extensively in film scores of the period.

When WWII started in 1939 Bode worked on military submarine sound and wireless communication projects “…We had the only choice in Germany, to go to military service or do work for the government. I praise myself lucky, that I was able to go to the electronic industry” and moved to the  small village Neubeuern in southern Germany, where in 1947 Bode built the first European post-war electronic instrument, the ‘Melochord’. In 1949 Bode joined the AWB company where he created the  ‘Polychord’ a simpler, polyphonic version of the ‘Melochord’ which was followed by the ‘Polychord III’ in 1951 and the  ‘Bode Organ’, a commercial organ which became the prototype for the famous Estey Electronic Organ. After leaving AWB, Bode’s designs included the ‘Tuttivox’, a miniature electronic organ and collaborated on a version of Georges Jenny’s ‘Clavioline’, both big sellers throughout Europe.

In 1954 Bode moved to the USA, settling in Brattleboro, Vermont where he lead the development team (and later, Vice President)  at the Estey Organ Corporation. In 1958, while still working at Estey, Bode set up the Bode Electronics Company where in March 1960 he created another unique instrument; a modular synthesiser “A New Tool for the Exploration of Unknown Electronic Music Instrument Performances” known as the  ‘Audio System Synthesiser’ which Robert Moog used as the basis for his line of new Moog synthesisers.

After the Estey Organ Company foundered in 1960, Bode joined the Wurlitzer Organ Co and moved to Buffalo, New York where he was one of the first engineers to recognise the significance of transistor based technology in electronic music.  Bode’s concepts of modular and miniature self-contained transistor based machines was taken up and developed in the early 1960′s by Robert Moog and Donald Buchla amongst others. 1962 saw the beginning of a long collaboration between Bode and the composer Vladimir Ussachevski at the  Columbia Princeton Center for Electronic Music which lead to the development of innovative studio equipment designs such as the  ‘Bode Ring Modulator’ and ‘Bode Frequency Shifter’. The commercial versions of these inventions were produced  under the Bode Sound Co and under license Moog Synthesisers.

Harald Bode retired in 1974 but continued to pursue his own research. In 1977 he created the ‘Bode Vocoder’ (licensed as the ‘Moog Vocoder’). In 1981 he developed his last instrument, the ‘Bode Barberpole Phaser’.

Harald Bode’s sketchbooks



The ‘Trautonium’ Dr Freidrich Trautwein. Germany, 1930

Dr Freidrich Adolf Trautwein (b Würzburg 1888, Germany; d Düsseldorf 1956)

The Trautonium was an important electronic musical instrument developed by the electrical engineer Freidrich Trautwein in Germany in 1930. Trautwein designed the first version of the instrument with the aim of freeing the performer from the restrictions of fixed (Piano) intonation. To achieve this, he removed the usual piano-style manual in his design and replaced it with a fingerboard consisting of a metal wire stretched over a rail, marked with a chromatic scale. By pressing the wire, the performer touches the rail below and completes a circuit generating a tone. A similar technique, copied by the Trautwein, was a feature of Bruno Hellberger’s Hellertion in 1929 and some time later in the Ondes Martenot.

Trautwein demostrating the early Trautonium, showing the pressure sensitive resistant finger-wire controller.

Trautwein demostrating the early Trautonium c1933, showing the pressure sensitive resistant finger-wire controller.

The position of the player’s finger on the wire determines the resistance in the wire which in turn controls the pitch of the oscillator. This unusual approach allowed a great deal of expressive flexibility; by pressing harder on the wire, the player could subtly change the volume, and by moving the finger from side to side the instrument could produce violin like glissandi or more subtle vibrato effects. Overall volume was controlled by a foot-pedal allowing the performer to vary the volume and envelope of the notes.

Early version of the Trautonium

An early 1930′s version of the Trautonium at the Deutsches Museum, Berlin

The first Trautonium was a fairly simple monophonic vacuum tube ‘synthesiser’  generating sound from a single thyratron RK1 tube oscillator. However, by passing this tone through a series of resonant filters this simple sawtooth waveform could be coloured with a wide range of timbre characteristics. This unique form of subtractive synthesis (i.e. filtering down an existing complex waveform rather than creating a complex waveform from combinations of simple sine waves) produced a tone that was distinctive and unusual when compared to the rather plain sound of other valve instruments in the 1920-30′s.

Telefunken advert of the 1930 version of the Trautonium


Advert of the Telefunken Volkstrautonium model Ela T42 showing the 380 Reichs Mark price

The commercial version of the Trautonium or ‘Volkstrautonium’ was manufactured and marketed by Telefunken in 1932. But, probably due to the unpopularity of a new, somewhat complicated keyboard-less instrument and high purchase price (c400 Reichs Marks;  equivalent of two and a half months of a worker’s salary  or more than five times the price of radio), only around thirteen items were sold and by 1938 it was discontinued. Despite the lack of domestic commercial interest, a number of composers wrote works for the instrument including Paul Hindemith ( who, switching allegiances from Jörg Mager’s Sphäraphon, learnt to play the Trautonium)  ‘Concertina for Trautonium and Orchestra’ , Höffer, Genzmer, Julius Weismann and most notably Oskar Sala. Sala became a virtuoso on the machine and eventually took over the development of the Trautonium producing his own variations- the ‘Mixtur-Trautonium’, The ‘Concert-Trautonium’ and the ‘Radio – Trautonium’. After the commercial failure of the instrument Trautwein abandoned further development to Oskar Sala who continued to work with the Trautonium until his death in 2002. Trautwein also produced an ‘Amplified Harpsichord’ in 1936 and ‘Electronic Bells’ in 1947.

Trautwein (L) and Oskar Sala with the Trautonium Berlin, c 1933

Trautwein (L), Paul Hindemith and Oskar Sala playing the Trautonium. Berlin, c 1933


Telefunken 1932 Volkstrautonium model Ela T 42 at the Deutsche Museum, Berlin

The Trautonium in 'Popular Mechanics' magazine USA 1939

The Trautonium in ‘Popular Mechanics’ magazine USA 1939

The Trautonium in 'Popular Mechanics' magazine USA 1939

The Trautonium in ‘Popular Mechanics’ magazine USA 1939


Dr Freidrich Adolf Trautwein (b Würzburg 1888, Germany; d Düsseldorf 1956) seen here in 1930.

Biographical notes: Dr Freidrich Adolf Trautwein (b Würzburg 1888, Germany; d Düsseldorf 1956)

Trautwein studied electrical engineering at the Technical University of Karlsruhe and later, law in Berlin. In the First World War he was a lieutenant in the German Army and led a mounted radio squad. After the war in 1919 he studied Physics in Heidelberg and Karlsruhe where he received his PhD in engineering. The following year he started working for the State Telegraph Service where he was involved in the establishment of the first German radio station in Berlin.

In 1929 he took a teaching position at the Berlin State Music Academy where he started early development of the Trautonium with the patronage and guidance of the composer Paul Hindemith. The first version of the Trautonium was completed in 1930 and a commercial version produced in 1933 by Telefunken; the Telefunken Volkstrautonium model Ela T42. After the commercial failure of his invention, Trautwein abandoned the instrument to composer and Trautonium virtuoso, Oskar Sala

The Trautonium played by Oskar Sala, incorporated into the 'Das Orchester der Zukunft (The Future Orchestra), alongside a Hellertion, Thereminvox and Elektrochord.

The Trautonium played by Oskar Sala, incorporated into ‘Das Orchester der Zukunft (The Orchestra of the Future), alongside a Hellertion, Thereminvox and Elektrochord c 1932

In 1949 Trautwein worked in briefly at the Bikla School for Photography and Film in Düsseldorf and then established the sound engineering course at the Düsseldorf Conservatory (now the Robert-Schumann-Hochschule in Dusseldorf ) which still forms the basis of the current sound engineering training unit. In 1952 Trautwein developed an evolved version of the Trautonium for WDR Electronic Music Studio, the Electronic Monochord. Trautwein died in Düsseldorf in 1956.


Peter Donhauser: Electric sound machines Böhlau, Vienna 2007.

Donhauser, P.: “Technical gimmick or fantastic reality Telefunken and the first electronic instruments in Germany?”, Lecture at the DTM Berlin, 03.11.2006

Peter Badge “Oskar Sala: Pionier der elektronischen Musik” Edited by Peter Friess Forword by Florian Schneider Satzwerk Verlag. ISBN 3-930333-34-1

“Oskar Sala-Die vergangene Zukunft des Klanges” A film by Oliver Rauch and Ingo Rudloff. Upstart Filmproduktion Wiesbaden

The ‘Ondium Péchadre’ H. Péchadre. France, 1930

The Ondium Péchadre was developed in France by H.C.R.Péchadre in 1930. The instrument was a monophonic heterodyning vacuum tube oscillator based instrument built into a light and portable heart shaped box, in performance the base of the instrument rested on the players knees and the instrument was supported against a table. The six octave range of the instrument was controlled by moving a pointer around a circular calibrated dial while the left hand controlled the volume of the sound with a velocity sensitive push button device. The attack and timbre of the sound wave could be altered to give a more staccato effect or softened to give a more string like sound.

The ‘Rhythmicon’ Henry Cowell & Leon Termen. USA, 1930

Henry Cowell and the Rhythmicon

Henry Cowell and the Rhythmicon

In 1916 the American Avant-Garde composer Henry Cowell was working with ideas of controlling cross rhythms and tonal sequences with a keyboard, he wrote several quartet type pieces that used combinations of rhythms and overtones that were not possible to play apart from using some kind of mechanical control- “un-performable by any known human agency and I thought of them as purely fanciful”.(Henry Cowell) In 1930 Cowell introduced his idea to Leon Termen, the inventor of the Theremin, and commissioned him to build him a machine capable of transforming harmonic data into rhythmic data and vice versa.

“My part in its invention was to invent the idea that such a rhythmic instrument was a necessity to further rhythmic development, which has reached a limit more or less, in performance by hand, an needed the application of mechanical aid. The which the instrument was to accomplish and what rhythms it should do and the pitch it should have and the relation between the pitch and rhythms are my ideas. I also conceived that the principle of broken up light playing on a photo-electric cell would be the best means of making it practical. With this idea I went to Theremin who did the rest – he invented the method by which the light would be cut, did the electrical calculations and built the instrument.”

Henry Cowell

“The rhythmic control possible in playing and imparting exactitudes in cross rhythms are bewildering to contemplate and the potentialities of the instrument should be multifarious… Mr. Cowell used his rythmicon to accompany a set of violin movements which he had written for the occasion…. The accompaniment was a strange complexity of rhythmical interweavings and cross currents of a cunning and precision as never before fell on the ears of man and the sound pattern was as uncanny as the motion… The write believes that the pure genius of Henry Cowell has put forward a principle which will strongly influence the face of all future music.”
Homer Henly, May 20, 1932

The eventual machine was christened the “Rythmicon” or “Polyrhythmophone” and was the first electronic rhythm machine. The Rhythmicon was a keyboard instrument based on the Theremin, using the same type of sound generation – hetrodyning vacuum tube oscillators. The 17 key polyphonic keyboard produced a single note repeated in periodic rhythm for as long as it was held down, the rhythmic content being generated from rotating disks interrupting light beams that triggered photo-electric cells. The 17th key of the keyboard added an extra beat in the middle of each bar. The transposable keyboard was tuned to an unusual pitch based on the rhythmic speed of the sequences and the basic pitch and tempo could be adjusted by means of levers.Cowell wrote two works for the Rythmicon “Rythmicana” and “Music for Violin and Rythmicon” (a computer simulation of this work was reproduced in 1972). Cowell lost interest in the machine, transferring his interest to ethnic music and the machine was mothballed.

Rhythmicon Discs

Rhythmicon Discs

After Cowell, the machines were used for psychological research and one example (non working) of the machine survives at the Smithsonian Institute.The Rhythmicon was re-discoverd twenty-five years after its creation by the producer Joe Meek (creator of the innovative hit single ‘Telstar’, 1961) apparently discovered abandoned in a New York pawnbrokers. Meek brought it back to his home studio in London where it was used on several recordings. This Rhythmicon was used to provide music and sound effects for various movies in the Fifties and Sixties, including: ‘The Rains of Ranchipur’; ‘Battle Beneath the Earth’; Powell and Pressburgers’ ‘They’re a Weird Mob’; ‘Dr Strangelove’, and the sixties animated TV series ‘Torchy, The Battery Boy’.The Rhythmicon was also rumoured to have been used on several sixties and seventies records, including: ‘Atom Heart Mother’ by Pink Floyd; ‘The Crazy World of Arthur Brown’ by Arthur Brown, and ‘Robot’ by the Tornadoes. Tangerine Dream also used some sequences from the Rhythmicon on their album ‘Rubicon’.
Rhythmicon Discs

Rhythmicon Discs


“Henry Cowell: A record of his activities” Compiled June 1934 by Olive Thompson Cowell.

The ‘Terpsitone’ Leon Termen, USA & Russia,1932

Termen's Terpsitone 1936

Termen’s Terpsitone 1936

The Terpsitone, named after the muse of dance Terpsichorè, was a dance controlled instrument using the same capacitance principles of the Theremin. The Terpsitone was designed built by Leon Termen for his wife who was a dancer. The Terpsitone removed the control antena of the Theremin and replaced it with a large metal sheet hidden under the floor. Movements of the dancers in the area above the sheet caused variations in pitch of the Terpistone’s oscillators due to the capictance of the dancers bodies. This instrument was used for several ‘exotic’ dance, music and light shows throughout the 1930′s.


“During his long and bright life, Leo Sergeyevich Termen made numerous discoveries and inventions. Among the different kind of brilliant inventions was the Terpsitone – which makes it possible for dancers to combine movement of body with music and light. Idea of the Terpsitone occured to L.Termen at the beginning of the 20th century, probably, immediately after the creation of Thereminvox. But as opposed to the Thereminvox where the pitch of tone and loudness depends on the position of the hands of the musician, the Terpsitone frequency and amplitude of sound are determined by a change in the position of entire body of a dancer. The operating principle of the Terpsitone is very similar to the operating principle Thereminvox, based on obtaining audio beat-frequencies, formed by theinteraction of high-frequency fluctuations of two oscillators. One has frequency rigidly fixed, while in the second is variable. In the second oscillator the frequency depends on a change in the distance between the capacitor plates of oscillatory circuit. One of the capacitor plates is an isolated, metallic plate placed on the floor of dancing hall, and second facing the body of the dancer. By moving through the space the dancer affects a change in the capacity of oscillatory circuit and, correspondingly, a change in the difference audio frequency. This signal is amplified and sent to the loudspeaker. Thus the motions of the dancer is converted into sound, which change synchronously with a change in the position of body.

The possibility of adding automated colour is an additional special feature of the invention. The “visual sound display” is a panel with  lamps, painted in different colours where the lamps light up to the motion of the dancer, moreover lamps with the specific colour corresponds to each note. However, this is ensured partially mechanically.

The Terpsitone in the acoustic laboratory, Moscow, 1966 consists of:

1) the electronic-music block, which works on the principle of Thereminvox with heterodyning high frequencies, with the device for vibrato and by a change in the loudness of sounding loudspeaker

2) An  electrical capacitance dancing platform with the size of 2 X of 1,8 X of 0.2 meters with that placed under it along entire its length and width by the electrode, connected through the resonance involving system with one of the high-frequency generators of musical block;

3) A dynamic loud-speaker with control of intensity and timbre. A Range-tool for the performance of melody by the motions of arms, head and legs of the dancer who stands on the platform – 2 octaves. More low-pitched sounds correspond to the locked position of hands and housing of that dancing, high to a maximally opened position, with the large external overall sizes. This experimental device adapts for training the executors of this new form of choreographic- musical skill. Are developed also the electrical circuits of the additional devices:

3.1) movement of executor forward gives audio gain, and its presence in the background ceases sound by means of the electrical capacitance influence on the electrode, fastened on the rear wall of dancing platform

3.2) the invariability of the pitch of tone with the displacement of that dancing and the appearance of that corresponding to the position of the executor of the new height of sounding with the cessations of motion.

Executors: Heads by the laboratory of acoustics and sound recording – Yurchenko A.D, the supervisor of sector – Termen L.CH., engineer – Rudakov YE.A., engineer – Matveyev V.N., technician

Termen’s “Terpsitone” by gimazutdinov K.N., Kazan, NII – SCIENTIFIC RESEARCH INSTITUTE “Prometheus”, 1996



The ‘Sonar’ Nikolai Anan’yev , Russia, 1933

The Sonar 1933

The Sonar 1933

The “Sonar” was a monophonic heterodyning vacuum tube instrument developed by Nikolai Anan’yev at the GIMN Acoustic Laboratory in the USSR from 1930. The Sonar used the same  heterodyning principles of Termen’s Thereminvox but with the addition of a fretted fingerboard to vary the pitch of the oscillator. This addition made the Sonar more popular (at the time in the early Soviet period) with musicians than the Thereminvox due to it’s familiarity and playability. The Sonar was said to have been able to reproduce violin like timbres as well as simple speech phrases such as “mama”, “papa” as well as conventional instrumental sounds and became known for it’s use in ‘proletarian’ outdoor events. Anan’yev  gave over six hundred concerts to around five hundred thousand people with the Sonar during his lifetime.


Sensor Technology and the Remaking of Instruments from the Past. Emmanuelle Gallin, Marc Sirguy

Sound in Z: Experiments in Sound and Electronic Music in Early 20th-century Russia. Published by Walther König, Köln. Edited by David Rogerson, Matt Price. Foreword by Jeremy Deller. Text by Andrei Smirnov.


The ‘Saraga-Generator’ Wolja Saraga, Germany ,1931

The Saraga-Generator was developed by the electrical engineer and physicist Wolja Saraga at the Heinrich-Hertz Institut Für Schwingungsforschung in Berlin, Germany around 1931. The Saraga Generator was an unusual theatrical photo-electrical  vacuum tube instrument. The Saraga Generator was designed to be used for theatrical production where the sound would be triggered by movement in front of the instrument. The instrument consisted of a photoelectric cell mounted on the white painted inside surface of a box with a small slit cut on one face. A low voltage neon lamp was placed at some distance from the box on a stage and the performers movements interrupting the light beam caused variations in pitch. Envelope and timbre were affected by manipulating a hand held switch device, the overall volume being controlled by a foot pedal. The instrument had a tonal range of four octaves.