I did generate a sine with it, but the problem is that if I use the fft
output for amplitude, the is being amplified to something around 4........
that's far to much, if you consider that I had put in a sine wave with
amplitude 1........
And if you would read the calculations I made in mail I just sent to John
Lazzaro, you would probably understand what I mean.....
Peter
----- Original Message -----
From: Niels Gorisse <niels@bonneville.nl>
To: <peter.maas@student-kmt.hku.nl>; <saol-dev@media.mit.edu>
Sent: Saturday, September 16, 2000 9:08 PM
Subject: Re: fft in saol
> >> if I use this formula I get amplitude values which don't make sense, if
> >> i put a 43 hz sine into a 1024 samples framed fft opcode
> >
> >Hmm, one thing comes to mind -- 43 Hz is a low frequency, you may not
> >be getting many cycles in your 1024 frame, which will make amplitude
> >estimation noisy. Try the experiment first with 1Khz and see if the
> >numbers make sense ... although I'm really not a spectral estimation
> >guy, so this could be an incorrect analysis ...
>
> Why not generate a sine tone and adjust it's amplitude with the data, and
> let your ears decide weither it's right or not. You'll hear it
immediately.
>
>
> Niels
>
>
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