tyler_durden Wrote: 
> As for DC offsets in music, yes, they sort of exist.  Music contains
> many even order harmonics which by definition result in assymetries of
> a waveform about the 0 volt line.  A sustained tone with 2nd harmonic
> will have a "DC offset".  You can demonstrate this easily by summing a
> pure sine with  another at twice the frequency.  See image.This image is not 
> in fact the sum of a sine wave with another at twice
the frequency.  The average over time of the sum of two functions is
the sum of the averages, so that if they both have zero mean, the sum
does, too.


-- 
tom permutt
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