[Clam-devel] Spectral Analysis/Synthesis problem

[Pau Arumí]

Probably Xavi will have more insight about these issues.
But the first thing that comes to my head is: it seems to me that you're
applying a rectangular window (type=None). Have you experimented with
other window types?

Pau


El dv 30 de 11 del 2007 a les 15:29 +0800, en/na globot va escriure:
> hi,
> 
> I am sorry to disturb you "again" but here is my problem :
> 
> I use this kind of network : 
> SpectralAnalysis--->3BandFilter--->SpectralSynthesis
> it work almost perfectly (with jackd buffer set to 64) but there is one 
> small glitch.
> 
> it seem that every "SpectralAnalysis.HopeSize" there is a peak appearing 
> in the synthetized sound.
> 
> here i put a example of what i got with those settings :
> - analysis.HopeSize = 128
> - analysis.ZeroPadding = 0
> - analysis.SamplingRate = 48000
> - analysis.FFTSize = 256
> - analysis.WindowSize = 257 (type = None)
> 
> + synthesis.ZeroPadding = 0
> + synthesis.SamplingRate = 48000
> + synthesis.AnalWindowSize = 257 (type = None)
> + synthesis.HopSize = 64
> + synthesis.SynthWindowGenerator.size = 129
> 
> PS : If i modfy the params to have FFTSize = 1024 so HopSize = 512, the 
> peaks will appear evry 512 sample.
> 
> Any idea what to do ? this is my last big problem... And i have 3 days 
> to solve it :(
> is it possible there is a small problem in SpectralAnalysis/Synthesis 
> class that would cause this while calculating first or last samples ? or 
> can this be solve buy changing parameters ? (i didn't find any suitable 
> combination)
> 
> 
> 
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