Music – Instruments – Electrical musical tone generation
Patent
1994-08-29
1996-04-02
Witkowski, Stanley J.
Music
Instruments
Electrical musical tone generation
84659, 84699, 84DIG9, G10H 112, G10H 708
Patent
active
055042708
ABSTRACT:
A method and apparatus for analyzing and reducing or increasing the dissonance of an electronic audio input signal are realized by identifying the partials of the audio input signal by frequency and amplitude. The dissonance of the input partials is calculated with respect to a set of reference partials according to a procedure disclosed herein. One or more of the input partials is then shifted, and the dissonance re-calculated. If the dissonance changes in the desired manner, the shifted partial may replace the input partial from which it was derived. An output signal is produced comprising the shifted input partials, so that the output signal is more or less dissonant that the input signal, as desired. The method may be used with computerized sound processing equipment, e.g., MIDI-based equipment. The input signal and reference partials may come from different sources, e.g., a performer and an accompaniment, respectively, so that the output signal is a more or less dissonant signal than the input signal with respect to the source of reference partials. Alternatively, the reference partials may be selected from the input signal to reduce the intrinsic dissonance of the input signal.
REFERENCES:
Tonal Consonance and Critical Bandwidth, Plomp et al., The Journal of the Acoustical Society of America, 1965, pp. 548-560.
Consonance Theory Part I: Consonance of Dyads, Kameoka et al. The Journal of the Acoustical Society of America, 1969, pp. 1451-1459.
Consonance Theory Part II: Consonance of Complex Tones . . . Method The Journal of the Acoustical Society of America, 1969, pp. 1460-1469.
Libert Victor E.
Spaeth Frederick A.
Witkowski Stanley J.
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