Hi everyone, I started to work with maxmsp and there we had the [pfft~] object that creates the overlaping like [block~] and [switch~] do in a subpatch on PD. I am working very well with PD and spectral processing, but then I had a more theretical doubt: What should be really an overlap? There are two possibilities that I figure:
1: Read continuosly a signal and overlaps on while readin. example: Imagine two 8-sample signal vectors on loop with these values: (0 0.125 0.25 0.375 0.5 0.625 0.75 0.875) (1 0.66 0.33 0 1 0.66 0.33 0)
These signal should be read on a subpatch with [block~ 8 2 1]. If it were read continuosly I would have for which element of the overlap: (0 0.125 0.25 0.375 0.5 0.625 0.75 0.875) and (0.5 0.625 0.75 0.875 1 0.66 0.33 0)
2: Read a signal vector and delay it: (0 0.125 0.25 0.375 0.5 0.625 0.75 0.875) and (0 0.125 0.25 0.375 0.5 0.625 0.75 0.875)
It seens that PD's [block~] and [switch~] work on second manner (see patch transcribed below).. But my question is this: To work with windowed signals for use with [fft~] and [rfft~] it wouldn't be better to overlap while reading? So I would have more spectral details because the windowing of the two overlaps would "cut" different informations of the signal...
If Puckette read this message, I have a question: On Max/MSP the overlapig of pfft~ object works like that too? It seens to work on the first way... I am asking to you because I imagine that you had implemented it on Max.
Thanks for the answers... J.H.
PS: on the patch I had used a strange way to do the tests but it was useful to me...
PD patch:
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