Blackman window for FFT spectrum analysis.
Window function: W[n] = 0.42 - 0.5 * cos(2π * n/N) + 0.08 * cos(4π * n/N), where n is the sample index and N is the window length.
Pass this value to the window parameter of AudioListener.GetSpectrumData or AudioSource.GetSpectrumData. The window is applied before the FFT to reduce spectral leakage between frequency bins.
Use the Blackman window when you need lower sidelobes than FFTWindow.Hamming or FFTWindow.Hanning and can accept a wider main lobe. For even stronger sidelobe suppression, use FFTWindow.BlackmanHarris.
Additional resources: FFTWindow, FFTWindow.BlackmanHarris, FFTWindow.Hamming.