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Position and Force Sensors and Their Application to Keyboards and Related Control Devices

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With the advent of MIDI, attention is being focussed on the design of touch-sensitive control interfaces for electronic music performances. Some recent MIDI keyboard designs employ position and/or force sensors on each key. The sensors are sensitive and repeatable, yet relatively simple and inexpensive. Keyboards equipped with these sensors enable the musician to impart continuous expressive variations to each tone that s/he is producing. Keyboards to be described include the Kurzweil MIDIBOARD, which enables the musician to continuously control one musical parameter per key, the Key Concepts Notebender, on which two parameters per key can be continuously controlled, and an experimental multiply-touch-sensitive keyboard on which three parameters per key can be continuously controlled.

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