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I have to create bands based on frequencies. i.e from 0-4Khz one band and the other from 4-8khz. depending on the band i have to cal. the further process.can some one help me on this please
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I would not necessarily bother with figuring out what the frequency of any group of samples is. I would instead just run it through a 0-4 kHz low-pass filter, and then determine whether the power of the resulting signal matched some threshold, and if so then pass on the signal (either the original signal or the filtered signal as appropriate for the situation.)