 "the goertzel algorithm is a digital signal processing (dsp) technique for identifying frequency components of a signal. while the general fast fourier transform (fft) algorithm computes evenly across the bandwidth of the incoming signal, the goertzel algorithm looks at specific, predetermined frequency." (wikipedia) buffersize: number of samples to analyze signal input: audio channel to analyze analysis output: output channel of analysis output - the strength of the specified frequency in the input signal freq: frequency to look at windowing: (unused) |