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Al's picture

Hi Brux,
1) This was a mistake I forgot to correct, I've sorted it out and committed it - Thanks for the reminder!

2) A Spectral Density function does not return frequencies in defined 'bins' as an Fast Fourier Transform would, this line simply aligns the frequency into steps before they are averaged (lines 1233-1242). I chose 20Hz as it seemed a good trade-off between accuracy and the amount of 'hits' the averaging function would get (line 1240).

Hope that's helpful,