Hello Everyone,
 
I don't understand the Analyzer in the Procurve EQ.  Why do I see frequencies showing (in darker grey) that fall outside the scope of my EQ plot (white line)?   Please see image below.  I am concerned with the dark grey under the red arrow I drew in.   Why would that frequency play if I specifically told the HPF to cut off before then?

I was thinking "is that what WOULD be playing if EQ was off?"  but then I thought.. "can't be, because as I move the EQ those "shadows" if you will kind of follow what I am doing, but always stays beyond the HPF point.

It's probably simple.



 
Thanks,
Adam
 
 

The frequency spectrum is not limited by the outline of the curve. The curve is just an indication of how much boost or cut is being applied at given frequency vs a flat line at 0dB (no boost or cut). And the spectrum is being measured against the meter scales on the outside of the meters where 0dB is at the top, and the middle of the scale is at -36dB.
 
If you had a white noise signal peaking at 0dB all across the spectrum, and you rolled off the highs and lows as you have indicated, you'd only be seeing a maximum of a 12dB cut at 40Hz and 6kHz. Note where -12dB is on the meter scales and you'll see that your signal would still be well outside the curve everywhere.
 
EDIT: Oops. Looks like I got that a little wrong. The spectrum power doesn't use the meter scale. But the cut that you see in the spectrum follows that scale more closely than the boost/cut scale, so the reduction in the spectrum is still proportionally smaller than the reduction in the curve.

 
 
EDIT never mind

Thanks for the info... so there is no way for me to totally eliminate everything below 40 Hz or so to get rid of the "boom" factor?   

I would imagine MEqualizer with a band set to 120db/octave would do it if that is what you really want to do.

scook
I would imagine MEqualizer with a band set to 120db/octave would do it if that is what you really want to do.

Hi Scook,
 
so we need an outside program to do proper EQ?

No, that is not what I am suggesting. The EQs supplied by SONAR are very good but if one has a requirement to "totally eliminate everything below 40 HZ" there are solutions provided by third party vendors such as the MFreeEffectBundle which one may want to consider. Using a 120db/octave filter is pretty extreme though.

aglewis723
Thanks for the info... so there is no way for me to totally eliminate everything below 40 Hz or so to get rid of the "boom" factor?   

Can you still hear the "boom" with that steep rolloff? My guess is that most listeners would not.

To answer the OP's question what is shown is the "curve shadow". That is the frequencies are shown but the darker part still lets one see the full frequencies but showing that they have been attenuated by the EQ curve. This is a guess on my part but I believe it to be correct.  If you make a more complex curve with more than just one overlapping area you will see that the darker frequencies follow the curve. 

Can you not chain eq's?