Filter
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18
ristics can be altered from GENTLE to STEEP, (also see point 9: BOOST/CUT ,
page 16).
IImmppoorrttaanntt::
If you switch on the N
OTCH mode, the bandwidth control Q
must be set at 0.6 (extreme right), so as to ensure a 1:1 level ratio with the
original signal.
Narrower notches can be obtained if the Q control is turned to the
extreme left. However, then the output level is also reduced by around
20dB.
Figure 4 shows the curves for the N
OTCH with GENTLE and STEEP characte-
ristics at Q0.6, along with the same curves at Q3.6.
Parametric
Fig. 4:
The N
OTCH
curves on the 0dB line
are shown for Q0.6. On the
outside, the curve is shown for
G
ENTLE
R
OLL
-O
FF
. The inside shows
the curve with S
TEEP
R
OLL
-O
FF
.
The N
OTCH
curves on the -20dB
line are shown for Q3.6. On the
outside, the curve is shown for
G
ENTLE
R
OLL
-O
FF
. The inside shows
the curve withS
TEEP
R
OLL
-O
FF
.
Fig. 5:
Three NOTCH curves with S
TEEP
R
OLL
-O
FF
. Placed at around 1 kHz,
44 kHz and 48 kHz.