Method of determining chord type and root in a chromatically tuned electronic musical instrument
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United States of America Patent
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Aug 9, 1983
Grant Date -
N/A
app pub date -
Jun 22, 1981
filing date -
Jun 24, 1980
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The type and root of a chord played on a chromatically tuned musical instrument are determined by assigning sequential numerical values to the notes of the chromatic scale and, when a chord is played, calculating the intervals between the individual notes comprising the chord arranged in numerical order. In a preferred embodiment the smallest interval and the interval immediately following the smallest interval are compared with prerecorded interval values commensurate with all defined chord types to identify the type of chord played. The recorded information also contains a root value for each defined chord and these root values are employed, along with the starting note of the smallest interval, to determine chord root.
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