Understanding FFT via coding - Max but transferable

I presume people have seen the fantastic Cycling74 tutorial in 6 parts on the FFT, starting from scratch, building external along the way.

I’ve just come across the amazing episode 7 where they explain phase deviation in the most intuitive way I’ve found so far, and use it to make a crude pitch tracker.

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oh and if you want a non-gen patch to find the loudest bin, I’ve done that in pfft before if you fancy a bit of coding.