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The Goertzel algorithm is a technique in digital signal processing (DSP) that provides a means for efficient evaluation of individual terms of the discrete Fourier transform (DFT)

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goertzel-algorithm's Issues

rounding error in optimizedGoertzel function

The 0.5 + is unnecessary on

k = round(0.5 + N*targetFreq(i)/sampleRate);

It exists in C as a rounding function when combined with an integer cast. The Matlab round function will do this automatically.

I notice it seems to still enable correct frequency detection but the the output magnitude is affected - producing an inaccurate normalised magnitude output (when dividing the output by number of samples).

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