Method of modifying harmonic content of a complex waveform
First Claim
1. A method of modifying the amplitudes of harmonics of a detected tone spectrum in a complex waveform, the method comprising:
- determining a dynamic energy threshold, as a function of frequency, from detected energy of partials;
continually determining an amplitude modification for each selected rank of the harmonics relative to the threshold; and
applying the determined modification with an amplitude modifying function to each harmonic of the detected tone spectrum selected by harmonic rank, where the frequency associated with each amplitude modifying function is continually set to the frequency corresponding to the harmonic rank as the frequencies of the detected tone spectrum containing the selected harmonics change over time.
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Abstract
A method of manipulating a complex waveform by considering the harmonic and partial frequencies as moving targets over time in both amplitude and frequency and adjusting the moving targets by moving modifiers in both amplitude and frequency. The manipulation of harmonic frequencies and the synthesis of harmonic frequencies are based on the harmonic rank. The modifiers move with the movement of the frequencies based on rank. Harmonic transformation modifies, by rank, the waveform from one source to a waveform of a second or target source. Harmonics and other partials accentuation identifies each of the frequencies and its relationship to adjacent frequencies as well as fixed or moving thresholds and make the appropriate adjustment. Interpolation is also disclosed as well as models which imitate natural harmonics.
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Citations
43 Claims
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1. A method of modifying the amplitudes of harmonics of a detected tone spectrum in a complex waveform, the method comprising:
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determining a dynamic energy threshold, as a function of frequency, from detected energy of partials; continually determining an amplitude modification for each selected rank of the harmonics relative to the threshold; and applying the determined modification with an amplitude modifying function to each harmonic of the detected tone spectrum selected by harmonic rank, where the frequency associated with each amplitude modifying function is continually set to the frequency corresponding to the harmonic rank as the frequencies of the detected tone spectrum containing the selected harmonics change over time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A method of modifying the amplitudes of harmonics of a detected tone spectrum in a complex waveform, the method comprising:
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determining a modification to selected ranks of the harmonics based on the frequency and energy of the harmonic relative to detected energy of partials of the detected tone spectrum; and applying the determined modification with an amplitude modifying function to each harmonic of the detected tone spectrum selected by harmonic rank, where the frequency associated with each amplitude modifying function is continually set to the frequency corresponding to the harmonic rank as the frequencies of the detected tone spectrum containing the selected harmonics change over time.
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Specification