The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 02, 1996
Filed:
Aug. 29, 1994
William A Sethares, Madison, WI (US);
Other;
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.