Music – Instruments – Stringed
Reexamination Certificate
2011-05-03
2011-05-03
Enad, Elvin G (Department: 2832)
Music
Instruments
Stringed
C084S306000, C084S454000, C084S200000
Reexamination Certificate
active
07935876
ABSTRACT:
A method and apparatus for string load reduction and real-time pitch alteration on stringed instruments. A string load is substantially reduced with a camming surface actuator so that the pitch can be rapidly manipulated by an input force which is generated by human power or an electronically controlled motor. Various types of camming surfaces are provided as well as a load optimization calculation which determines the shape of a variable ratio camming surface. Multiple embodiments are described including a constant force pitch alteration device, a motorized control system with pitch compensation and real-time tracking of string pitch to multiple relative input signals, a control signal generator based on real-time position measurement of a control object relative to an electromagnetic radiation sensor, and methods for generating mechanical looping, vibrato, and polyphonic chorus effects which can be automated or dynamically controlled by a user. Other embodiments are described and shown.
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Robot Guitar, www.gibson.com/robotguitar, released Dec. 7, 2007 (no printed documents found), Gibson Corporate, Nashville, TN, USA, viewed on line.
Buchla Lightning, www.buchla.com/lightning, released 1991 (no printed documents found), Buchla & Associates, Berkeley, CA, USA, viewed on line.
Enad Elvin G
Horn Robert W
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