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FFT bins and frequencies
Summary
| A matlab function giving the frequencies corresponding to FFT bins |
  Related: An example that manipulates an audio signal in the frequency domain |
Introduction
FFT bins correspond to frequencies. This matlab function returns the frequency for each bin, relative to the sampling rate.Note: For an even-sized FFT, the highest bin is shared by negative and positive frequencies.
The function reports the bin as a negative frequency, for no particular reason.
Matlab function download
Download mn_FFT_frequencybase.m.Usage
| % for example: (fs=sampling frequency) fs=44100; fb=mn_FFT_frequencybase(length(signal)); plot(fs*fb, 20*log10(abs(signal))); |
Parameters
- nBins: real-valued, number of FFT bins
© Markus Nentwig 2007-2008
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