A high resolution fundamental frequency determination based on phase changes of the Fourier transform

摘要: The constant Q transform described recently [J. C. Brown and M. S. Puckette, ‘‘An efficient algorithm for the calculation of a transform,’’ J. Acoust. Soc. Am. 92, 2698–2701 (1992)] has been adapted so that it is suitable tracking fundamental frequency extremely rapid musical passages. For this purpose previously modified resolution rather than lower bins. This serves as input tracker similar to by Brown, ‘‘Musical using pattern recognition method,’’ 1394–1402 (1992)]. Once fast Fourier (FFT) bin corresponding chosen tracker, an approximation used phase change in FFT time advance one sample obtain precise value frequency. Graphical examples are given passages violin executing vibrato glissando where changes continuous.