P-Dsp: Graphic Equalizer Fine Adjustment Function - HELIX PP50DSP Operating Instructions Manual

The "Q" slide control is used to adjust the bandwidth of the frequency cut. A low Q-factor equates
to a broad band reduction, while a high Q-value equates to a particularly narrow band cuts. The
effect of the "Q" control is illustrated in the following diagram:

P-DSP: Graphic equalizer fine adjustment function

The FineEQ function is used to precisely adjust the 1/3 octave equalizer and provides a similar
function to the parametric filter of the PP50 DSP. The FineEQ function makes it possible to adjust
each of the 30 bands of each channel even more accurately. Therefore, both the center frequency
and the Q-factor of each band may be adjusted with great precision. To finely adjust the selected
band, click with the mouse on the level control of the specific band. This should turn red. On the
right hand side in the "EQ Fine Setting" area, you can now adjust the center frequency of the band
up and down. This adjustment is made in 1/12-octave increments. The quality (Q-factor) of each
band may also be adjusted. The default value for each band is 4.3. In this respect, the P-DSP
provides the option of adjusting a frequency cut or boost with a narrower band width. This function
mainly serves to eliminate specific individual problems in the frequency response.
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