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Abmatos
Abmatos
Participant
Mar 27, 2020 2:09 AM UTC
Question

What is the fft window overlap on the spectral display?

Hi,  I would like to be able to tweak the step (or the overlap) between adjacent windows used to compute the spectral display. Is this possible?

If it isn't, at least it would be nice to know what is the overlap being used by default. Is it the same for all possible windows used (Hann, Hamming, Blackman, etc)? Anyone knows where I can find that information?

FYI I'm using build 13.0.4.39

Thanks.

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4 replies

SteveG_AudioMasters_
Community Expert
SteveG_AudioMasters_Community Expert
Community Expert
Mar 27, 2020 9:47 AM UTC

I'm afraid that if it's not in the Spectral Displays part of Preferences, or available as a right-click on the RHS of the specral display, you can't alter it. There is no information about this publically available, but I know that the overlap is set to optimise the refresh rate - but that's normal with this type of display. The same applies to the Frequency Analysis plugin -no information available.

 

 

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    Abmatos
    AbmatosAuthor
    Participant
    Mar 27, 2020 2:31 PM UTC

    Thank you very much for the information! 🙂

    Do you know if there a channel where one can ask this kind of information directly to adobe (e.g. what is the overlap used)?

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    SteveG_AudioMasters_
    Community Expert
    SteveG_AudioMasters_Community Expert
    Community Expert
    Mar 27, 2020 3:07 PM UTC

    There is no channel accessible to you that would hand out that sort of technical information at all, I'm afraid. Also, I think (having studied what it does carefully) that it may well be that the overlap varies, according to the FFT size and resolution. If this is the case, then simply for commercial reasons, there's no way they are going to tell you, because it's performance-based. On top of that, Adobe have traditionally never handed out much in the way of technical information that they weren't absolutely forced to!

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