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Article

Anne Beetem Acker

Technology that allows a person to control a music-related output with commands expressed by brain signals. The output signal can control physical and virtual instruments and composition systems. Therapeutic applications include allowing severely physically disabled persons to participate actively in music-making. A number of methods of detecting and measuring brain activity have been tried; electroencephalography (EEG) has proved to be the most practical. Neural activity generates electric fields that can be detected by EEG electrodes placed on the scalp. The electrodes are placed in an array that allows mapping of neural activity over time. The signals are very weak and must be amplified and broken into frequency bands commonly labeled from low to high as Theta, Delta, Alpha, low Beta, medium Beta, and Gamma....

Article

Hugh Davies

Electronic organ designed by the organ builder Edouard Eloi Coupleux of Tourcoing and the radio engineer Joseph Armand Givelet in Paris in 1929–30, and produced under patents of 1934 and 1936. It was the first successful polyphonic instrument based on electronic oscillators (demonstrated already in Givelet’s monophonic ...

Article

Laurence Libin

(b Napier, New Zealand, May 14, 1946). Intermedia artist whose transdisciplinary practice includes video/sound work and installations, experimental instruments, graphic scores, and improvisation. He studied at Elam School of Fine Arts, Auckland (DipFA Hons, 1971) and the University of West Sydney, Nepean (MA Hons, ...

Article

Anne Beetem Acker

Line of MIDI-based reproducing player pianos introduced by Yamaha Corporation in 1982 (1986 in North America). The Disklavier system combines an acoustic piano with an electromechanical player-piano system. As in other such systems, fibre-optic sensors register the movement of keys, hammers, and pedals during performance, while the digital controller operates a bank of solenoids installed under the piano’s key bed; one solenoid is positioned under the tail of each key, with additional solenoids connected to the pedal rods. Performance information is stored digitally on CD-ROM, floppy discs (still used for many accompaniments for instructional piano material), or a hard drive. Disklavier systems can be connected to sequencers, tone modules, and computers via MIDI and Ethernet. A built-in speaker system attached to the case under the soundboard is used to play back optional digital piano sound and especially for playback of accompanying orchestral or vocal tracks....

Article

Duo-Art  

Reproducing piano mechanism that made it possible to record on paper rolls the nuances of dynamics, tempo, and phrasing; introduced by the Aeolian Co. in 1913 (see Player piano and Aeolian).

Article

Hugh Davies

Electronic organ, several models of which were designed by Leslie (E.A.) Bourn from the early 1930s and manufactured by the John Compton Organ Co. (later Compton Organs Ltd) between the mid-1930s and 1970. In 1926 Bourn approached John Haywood Compton with a proposal for the production of a ‘pipeless’ organ, and was invited to join the staff of Compton’s company. By about ...

Article

Hugh Davies and Anne Beetem Acker

The Swedish national centre for electronic music and sound art, in Stockholm. It was preceded by a smaller studio run by the Worker’s Society of Education from 1960. EMS was established by Swedish Radio in 1964 under music director and composer Karl Birger Blomdahl (...

Article

(b Luxembourg, Aug 16, 1884; d New York, Aug 19, 1967). American writer, publisher, and inventor. In 1904 he emigrated to America, where in 1908 he founded the first of a series of radio magazines (including Radio-Craft) which he wrote for and edited. He later turned to science fiction magazines (from ...

Article

Hugh Davies

(b Rheims, France, 1899; d La Varenne St-Hilaire, St-Maur-des-Fossés, France, Nov 9, 1963). French engineer and physicist. He was one of the pioneers of electronic instruments and especially of the electronic organ in the 1920s and early 1930s; some of his instruments were constructed in collaboration with the organ builder Edouard Eloi Coupleux. In ...

Article

Gnome  

Hugh Davies

Electronic keyboard instrument developed by Ivan Eremeeff in Philadelphia, Pennsylvania, in 1932; it was the smaller and better known of two instruments based on the same principles that Eremeeff built in that year. Rotating electromagnetic tone wheels generated the sounds. The keyboard (three and a half octaves) and the bench on which the player sat formed part of an electrical circuit; when one of the stationary, touch-plate keys was fingered, an electrical contact was made through the performer’s body with the metal top of the bench. In addition to pedals governing volume and tremolo there was also a decay control. The Gnome was designed for home use and could be connected to the amplifier and loudspeaker of a domestic radio set....