Hi,
I have a silly question on FFT1024 from the Audio Library.
my understanding is that the fft will return the REAL part of the spectrum, and so 512 coeff (N/2), but I would like to know how is the amplitude normalized. is that normalized to 1 ? or to the N/2 samples num?
Also, is there an indication of what level of input signal (Vpp) is required to maximize the fft amplitude?
for example for a 1Khz sinusoidal signal (mic or line input) what is the amplitude needed to max the fft coeff at 1Khz?
a little bit OT: is there a way to compute multiple FFT (series of fft) with partially overlapping windows using the fft1204?
I see the option to delect the sampling window ... but if I'm not wrong that does not help when you need a larger (>1024) FFT size.
thanks
I have a silly question on FFT1024 from the Audio Library.
my understanding is that the fft will return the REAL part of the spectrum, and so 512 coeff (N/2), but I would like to know how is the amplitude normalized. is that normalized to 1 ? or to the N/2 samples num?
Also, is there an indication of what level of input signal (Vpp) is required to maximize the fft amplitude?
for example for a 1Khz sinusoidal signal (mic or line input) what is the amplitude needed to max the fft coeff at 1Khz?
a little bit OT: is there a way to compute multiple FFT (series of fft) with partially overlapping windows using the fft1204?
I see the option to delect the sampling window ... but if I'm not wrong that does not help when you need a larger (>1024) FFT size.
thanks