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PlaySpectrum_filt Run an FFT on soundfile playback, and plot the spectrum in dB. Includes a stage of filtering with a directly-implemented 2 pole IIR filter. Mouse x controls center frequency, y controls bandwidth (Q). Bandpass filter is implemented explicitly instead of using the minim bpf class "for educational purposes". Based on by ddf, and copies the idea of by ddf. 2010-02-03 Dan Ellis

Source code: PlaySpectrum_filt

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