I did some work, and I’m really stunned of Max/MSP’s possibilities.
The patch I worked on is attached, there’s only one problem: pitch~ seems to fail in analysing low frequencies… For the upper part of the keyboard everything works just great.
I was thinking that a FFT needs at least one complete wave to analyse a frequency, is it possible that the samples are to small for low frequencies so there can’t be a complete wave in one?
My patch is attached, in the zip I included the pitch~ external and the fftw3.dll used to analyse (fftw3.dll should be in your max folder)
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