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mindwarp~

mindwarp~ performs spectral envelope warping.


mindwarp~ performs spectral envelope warping. It can be used to correct for the formant shifting effects of pitch-scaling. The warp factor is tuned to warp spectra to compensate for directly corresponding pitch-scaling values. For example, if you have pitch-scaled a signal by a factor of two, increasing its frequency content by an octave, by providing mindwarp~ with a warp factor of 2. and the pitch-scaled signal, mindwarp~ will restore the spectral formant of the signal to an estimation of the shape present in the original unscaled signal. Currently, warp factor values are restricted to the range [1/16 ... 16.]. mindwarp~ utilizes frequency shaping to perform its duty.
from the library :
FFTease
Format : External
Environment : msp / PD
freeware
Max 3.x / 4.x



http://www.sarc.qub.ac.uk/~elyon/LyonSoftware/MaxMSP/FFTease/

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