– what is the fast Fourier transform in relation to audio processing?
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The Fourier transform converts Signal vs Time to Intensity vs Frequency, effectively breaking the signal into it’s frequency components. The fast part of FFT is a particular algorithm that makes it easier for computers to do this conversion. The intensity vs Frequency graph is useful for finding particular noises like clicks etc. You’ll recognise the spectrum analyser is the result of an FFT.
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