Hamming window for FFT spectrum analysis.
Window function: W[n] = 0.54 - 0.46 * cos(2π * 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.
The Hamming window is a general-purpose choice when FFTWindow.Rectangular shows too much leakage and tighter sidelobe control from FFTWindow.Blackman or FFTWindow.BlackmanHarris is not required. It is similar to FFTWindow.Hanning but uses different coefficients, which affects the balance between frequency resolution and sidelobe levels.
Additional resources: FFTWindow, FFTWindow.Hanning.