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flaXen

detecting the volume of a frequency

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I need to figure out how to detect the volume of a specific tone (~2.55KHz) in a sound clip. I hardly know anything about FFTs, but I know I don''t need a whole 1D FFT for this. I just need to find the volume of one frequency, not all frequencies hehe. So does anyone know if there is a simple formula to detect the volume of a given tone in an audio sample? Thanks!

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Please post if you find out a simple formula or algorithm by the way... could be very useful in many cases ...

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