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The Composer-Tron was developed by Osmond Kendal for the Canadian Marconi Company in 1953.
It was the first analogue synthesis and composition instrument of its kind. It utilized a unique and innovative control system that had a cathode ray tube input device that could read shapes or patterns that was hand drawn on to its surface with a grease pencil. The drawn shape could define the timbre of the note, or the envelope shape of the sound. A sequence of the rhythmical markings could be defined using the writings similar to a cue sheet type strip of film.
This was the future innovation for composers. With Kendal's grease pencil, the composer could draw the grooves, run it through the Composer-Tron and can ensure that all written music was listened to first, before symphony orchestra’s played the music. Before the Composer-Tron composers would have to wait years just to listen if their work was complete. Sometimes their best work was never heard by the composer himself.
- Darter, Tom (1984). The Art Of Electronic Music. 1984, Part 2. GPI Productions. pp. 46–47. ISBN 978-0-688-03105-3.
- "The Composer-Tron (1953)". Archived from the original on 2007-02-28.
- "The Composer-Tron (1953)". 120 Years of Electronic Music.
"The Art Of Electronic Music", Darter,Tom. 1984 GPI Productions. (pp. 46_47)
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