Electronic Musical Instrument 1870

Termenovskiy "TERPSITON" Of gimazutdinov K.N., Kazan, NII - SCIENTIFIC RESEARCH INSTITUTE "Prometheus", 1996 terpsdance.jpg (21688 bytes)Za his long and bright life Leo Sergeyevich termen made numerous discoveries and inventions. And among the different kind of brilliant inventions worthy place occupies "terpsiton" - the tool, which makes possible for dancer to combine the plastic of body with the music and the light. Idea "terpsitona" arrived at L.Termenu is even in the beginning of the 20th annual, probably, immediately after the creation of "termenvoksa" (see its article "cathodic musical tool"). But if into "termenvokse" the pitch of tone and loudness they depend on the position of the hands of executor, then in "terpsitone" frequency and amplitude of sound are determined by a change in the position of entire body of that dancing. Operating principle "terpsitona" is very similar to the operating principle "termenvoksa", based on obtaining of beatings of audio frequency, the formable with interaction of high-frequency fluctuations two generators. One has of the generators frequency rigidly fixed, while in the second - variable. In the second generator the frequency depends on a change in the distance between the capacitor plates of oscillatory circuit. One of the capacitor plates is the isolated, metallic plate the placed hearth by the floor of dancing hall, and second facing is the body of dancer. TerpsitonePereme?nie dancer in the space of hall entails a change in the capacity of oscillatory circuit and, correspondingly, a change in the difference audio frequency. This signal is strengthened and will be given to the loudspeaker. Thus the conversion of the motions of that dancing into the sounds, which change synchronously with a change in the position of body, is achieved. The sonic number, obtained as a result of dance, is supplemented, if necessary, with the specially selected background music. The presence of automatic color joining is one additional special feature of invention. the "visual display of sounding" is panel with the lamps, painted in different colors. In time to the sounds, generated by the motion of dancer, light up the lamps, moreover lamp with the specific color corresponds to each note. However, this is ensured partially mechanically. The uvula, located of from behind each lamp, vibrates at that moment, when the sound corresponding to it is reproduced, the chain, which feeds lamp, is locked thanks to which. The sounds, generated by the motion of dancer, are reflected with the aid of the simultaneously being lit up and dying out fires. the "visual display of sounding" includes two generators, one of which gives a constant pitch (it it is possible to regulate), and the second - variable, its work changes from the motions of dancer and change in the capacity of the metallic plate, connected to the chain of lattice. Further signal will be given into the mixer or the control valve, to the sonic amplifier and the lamp panel. On the control panel located above are placed the volume controls and timbre, and also the regulator of control of vibrator, which controls the lamp panel of the visualization of notes. Terpsiton in the acoustic laboratory, Moscow, 1966 Survey is comprised on the basis of the American press of the 30th it is annual. "terpsiton" was the new tool, which enlarged the creative possibilities of ballet skill, and the introduction of svetodinamichskikh means made it possible to approach the idea of the realization of the synthesis of skills. The first version of tool was prepared during a stay Of termena in THE USA. Another - during its work in the Moscow conservatory (1966-67 yr.). One additional copy was made for also entirely young Lydia kavinoy in the 70's and is located at its disposal to this day. TERPSITON Tool for the synthesis of melody and plastic the laboratory of musical acoustics of Moscow conservatory the report Of l.S.Termena THEME 5- P, 1966. For the experimental works on the precise synthesis of motion and position of human body and audio frequency in the laboratory of acoustics is executed odnogolosnaya installation of the type "terpsiton". It consists of: 1) the electronic-music block, which works on the principle of termenvoksa with heterodyning of high frequencies, with the device for vibrato and by a change in the loudness of sounding loudspeaker, 2) 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) dynamic loud-speaker with the adjustment of intensity and timbre. Range of tool for the performance of melody by the plastic motions of housing, arms, head and legs of executor, 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: 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. 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. This is achieved by the application of a phantastron circuit for the sonic generation and by the fixation of stress on it at the moments of sufficient values of the derivative of a change of the frequency with time. 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 - butt-ends a., engineer - Matveyev V.N., technician