Re: Confused about data returned from an FFT for a AU
Re: Confused about data returned from an FFT for a AU
- Subject: Re: Confused about data returned from an FFT for a AU
- From: Volker in Lists <email@hidden>
- Date: Fri, 13 Mar 2009 16:38:37 +0100
Hi,
the result of an FFT is "power" for each frequency class (you have
FFTSIZE/2 classes) . So you do the right thing walking through the
FFTSIZE/2 bins. You write something about interleaving - afaik
interleaved data has to be serialized before sent through the FFT.
What do you mean by passing the whole signal through? Usually if your
signal is longer than the window size you move your window over the
signal (w/ or w/o overlap) and that way you can get a 2D spectral
representation (frequency over time) (Sonagramm). You shouldn't
average to get a single spectrum in the end, but use a larger window,
best with zero padding and a square window function (or no window
function, which is the same).
Further questions? Mail me in private.
Volker
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Coreaudio-api mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden