Crown Audio IQ-PIP-USP2_CN - Manual (Page 54)

IQ-PIP-USP2/CN
Page 54 IQ-PIP-USP2/CN Reference Manual
10.7 Q-Factor Calculation
Many of the DSP filters on the IQ-
PIP-USP2/CN feature adjustable Q-
factor, which is a measure of the
filter’s selectivity or sharpness. Q-
factor is adjustable in fractions of an
octave on the IQ-PIP-USP2/CN.
Use the table in Figure 10.14 to
determine Q-factor for a given band-
width in octaves. The table relates
the Q-factor to bandwidth in oc-
taves according to the equation:
where K is the number of equal
divisions per octave.
Figure 10.14 Q-factor vs.Bandwidth
2 (1/2K)
1 (1/K) –1
Q=
Q-factor
0.200
0.266
0.667
1.414
2.415
2.871
4.318
8.651
14.42
28.85
43.28
50.00
100.0
K
0.21
0.25
0.5
1
1.5
2
3
6
10
20
30
34.7
69.3
BW in Octaves
4.8
4
2
1
2/3
1/2
1/3
1/6
1/10
1/20
1/30
1/35
1/70
that the algorithm simply cannot
overcome. In these cases, widening
the high and low limits will help de- crease the “sensitivity” of supervi-
sion and decrease chance of “nui-
sance” error reports.