>>	And i presume that resonance and "Q" are the same thing, is this
>>correct?

>Umm yes pretty much. (I think) Although I think Q is sometimes used to
>describe the band-width of a band pass filter but that's sort of the same
>thing.

Q actually stands for "Quality" and is defined as the ratio of the center
frequency to the band width, i.e., Q = CF/BW, where CF and BW are specified
in Hz. It's a more musically useful (or intuitive) parameter than the band
width, itself, because as the center frequency is swept over the full
frequency range, the width of the band must change proportionally in order
for the quality of the filter to sound the same. Obviously, a high Q means a
relatively narrow band width (i.e., BW is a small value in Hz, compared to
the CF). This results in a sharp peak in the frequency response at the CF;
the sharper the peak, the greater the "resonance" at that point in the spectrum.


----------------------------------
Russell F. Pinkston, D.M.A.
Associate Professor of Composition
Director, Electronic Music Studios
School of Music
The University of Texas at Austin
Austin, TX 78712

[512-471-0865]