Rasmus Althoff, Florian Keiler, and Udo Zolzer, "Extracting Sinusoids From Harmonic Signals," in Proceedings of the Digital Audio Effects (DAFx) Workshop, Trondheim, Norway, December 1999, Norwegian University of Science and Technology (NTNU) and COST (European Cooperation in the Field of Scientific and Technical Research), pp. 97--100.  Home/Search   Document Details and Download   Summary   Related Articles

....the pitch corresponds to the gcd of the peaks in the spectral envelope, even if the first peak is missing. 3. FOURIER OF FOURIER TRANSFORM In our FT analysis method [10, 11] we proposed to take advantage of two Fourier transforms computed in parallel. The resulting analysis precision [12] has recently been used for accurate pitch detection [13] We show here that the use of two Fourier transforms in sequence is of great interest too. More precisely, we consider the magnitude spectrum of the Fourier transform of the magnitude spectrum limited to positive frequencies of the ....

....with the greatest amplitude. The problem is that for some sounds this maximum of energy is detected at the wrong place from time to time. This often leads to jumps among octaves and results in a poor robustness. We propose to apply a peak tracking strategy similar to partial tracking (see [12]) except that this time we deal with pseudo partials , that is partials detected in the spectrum resulting from the Fourier of Fourier transform. When obtain a set of partials, as shown in 200 400 600 800 1000 1200 1400 1600 1800 2000 0.8 0.6 0.4 0.2 0 0.2 0.4 0.6 0.8 1 Time (samples) ....

Rasmus Althoff, Florian Keiler, and Udo Zolzer, "Extracting Sinusoids From Harmonic Signals," in Proceedings of the Digital Audio Effects (DAFx) Workshop, Trondheim, Norway, December 1999, Norwegian University of Science and Technology (NTNU) and COST (European Cooperation in the Field of Scientific and Technical Research), pp. 97--100.

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