High Pass And Low Pass Filters; Adjusting The Sound Control (Eq 1 To 7); Bypass; Selecting The Filter Type - IMG STAGE LINE DSM-240 Bedienungsanleitung

5.4.5 High pass filter and low pass filter
GB
Each output has a high pass filter and a low pass
filter which as a combination primarily achieve
the function of a crossover network (for fre-
quency-depending distribution of an input signal
to two or several output channels).
1) Select an output with its button (10).
2) To adjust the high pass filter, use the rotary
knob NAV/ PM1 to select the menu item
HPF ƀ
and confirm with the button ENTER.
The present adjustment is shown, e. g.
ƊBessel_2nd F =
i. e. filter characteristic: Bessel, 2
off frequency =100 Hz
3) Use the rotary knob PM2 to select one of 17
filter characteristics or
the filter. A change is effective immediately.
The following filter characteristics are avail-
able:
Buttw_1st
Butterworth filter of first order with a slope of
6 dB/octave
Buttw_2nd
Butterworth filter of second order with a slope
of 12 dB / octave
LRiley_2nd
Linkwitz-Riley filter of second order with a
slope of 12 dB / octave
Bessel_2nd
Bessel filter of second order with a slope of
12 dB / octave
Buttw_3rd
Butterworth filter of third order with a slope of
18 dB / octave
Buttw_4th
Butterworth filter of fourth order with a slope
of 24 dB / octave
LRiley_4th
Linkwitz-Riley filter of fourth order with a
slope of 24 dB / octave
Bessel_4th
Bessel filter of fourth order with a slope of
24 dB / octave
LRiley_6th
Linkwitz-Riley filter of 6th order with a slope
of 36 dB / octave
LRiley_8th
Linkwitz-Riley filter of 8th order with a slope
of 48 dB / octave
Custom_2nd
filter of second order with variable quality fac-
tor (Q), slope of 12 dB / octave
Custom_3rd
two cascaded filters with separately ad -
justable cut-off frequencies and variable
quality factor (Q) for the second filter, slope of
18 dB / octave
Custom_4th
two cascaded filters
adjustable cut-off frequencies and variable
quality factor (Q) for both filters, slope of
24 dB / octave
Custom_5th
three cascaded filters
adjustable cut-off frequencies and variable
quality factor (Q) for two filters, slope of
30 dB / octave
Custom_6th
three cascaded filters with separately ad -
justable cut-off frequencies and variable
quality factor (Q) for all filters, slope of 36 dB /
octave
28
Custom_7th
four cascaded filters with separately ad -
justable cut-off frequencies and variable
quality factor (Q) for three filters, slope of
42 dB / octave
Custom_8th
four cascaded filters with separately ad -
justable cut-off frequencies and variable
quality factor (Q) for all filters, slope of 48 dB /
octave
4) Use the rotary knob PM3 (7) to adjust the fre-
quency. A change is effective immediately.
100Hz
For making major frequency changes faster,
nd order, cut-
press the button ENTER. The lower line of
the display now shows e. g.:
ƊEdit Freq =

Bypass

to bypass
The frequency can now purposefully be
changed with the rotary knobs NAV/ PM1 in
steps of 1000 Hz, PM2 in steps of 100 Hz and
PM3 in steps of 1 Hz. To return to the higher
menu level, press the button ESC.
5) For the filter characteristics "Custom...": to
adjust the additional parameters depending
on the filter order, use the rotary knob NAV/
PM1 to select the individual filters
Filt4
ƊFilt1 F = 100Hz Q= 0.80
The parameters can be changed according to
the rotary controls PM2 and PM3. A change
is effective immediately.
Proceed as in step 4) for a fast frequency
change.
6) Exit the submenu with the button ESC.
7) The low pass filter can be adjusted in the
same way. For this purpose call the menu
item

5.4.6 Adjusting the sound control (EQ 1 to 7)

In addition to the high pass filter and low pass fil-
ter, each output has 7 filters which can be
adjusted independently. Via the function EQ
Bypass
bypassed.
1) Select an output with its button (10).
2) Use the rotary knob NAV/ PM1 to select the
menu item
ton ENTER. The present adjustment is
shown.
3) Use the rotary knob PM2 to define if the
filters of this channel are to be effective
ƊEQ Bypass : Off
(
Bypass : On
diately.
4) Exit the submenu with the button ESC.
For each of the 7 filters (
lowing parameters may be adjusted. The deacti-
vation of the function described above (
Bypass : Off
change of these parameters. Otherwise a note
on this subject will appear when calling one of
with separately
the following submenu items.
5.4.6.1 Bypass
This function only allows to bypass the filter
selected.
with separately
1) Select an output with its button (10).
2) Use the rotary knob NAV/ PM1 to select the
desired filter (
with the button ENTER. The present adjust-
ment is shown, e. g.
ƊByp=Off
3) Use the rotary knob PM2 to define if the
selected filter is to be effective (
100Hz
Filt1
, e. g.
LPF Ɓ
in step 2).
these filters can completely
EQ Byp
and confirm with the but-
) or bypassed (
). A change is effective imme-
EQ-1 EQ-7
to
) is a prerequisite for the
EQ-1 EQ-7
to ) and confirm
ƊByp=Off
ƊByp=On
or bypassed (
tive immediately.
4) Exit the submenu with the button ESC.
With active bypass function (
possible to change the other parameters of this
filter.

5.4.6.2 Selecting the filter type

17 filter types with different characteristics are
available. To change the filter type:
1) Select an output with its button (10).
2) Use the rotary knob NAV/ PM1 to select the
EQ-1
desired filter (
with the button ENTER. The present adjust-
ment is shown, e. g.
Input-A
ƊByp=Off Type=Peaking_Eq
In addition to the filter type (
a symbol for its characteristic (
the top right:
3) Select the filter type with the rotary knob
PM3. A change is effective immediately.
The following filter types can be selected:
Ƅ Peaking_Eq
to
filter with bell characteristic with adjustable
gain / attenuation, mid-frequency and quality
factor
ƃ Hi-Shelv_1
high frequency filter of first order with shelv-
ing characteristic
The level at the adjustable cut-off frequency
is 3 dB below/ above the adjusted gain / atten-
uation; the slope is 6 dB / octave.
ƃ Hi-Shelv_2
high frequency filter of second order with
shelving characteristic
The level at the adjustable cut-off frequency
is 3 dB below/ above the adjusted gain / atten-
uation; the slope is 12 dB / octave.
ƃ Hi-Shelv_Q
symmetric high frequency filter with shelving
characteristic.
be
The level at the adjustable cut-off frequency
is half of the adjusted gain / attenuation; the
slope depends on the adjustable quality fac-
tor
Ƃ Lo-Shelv_1
low frequency filter of first order with shelving
characteristic
The level at the adjustable cut-off frequency
is 3 dB below/ above the adjusted gain / atten-
uation; the slope is 6 dB / octave.
ƊEQ
Ƃ Lo-Shelv_2
low frequency filter of second order with
shelving characteristic
The level at the adjustable cut-off frequency
) the fol-
is 3 dB below/ above the adjusted gain / atten-
uation; the slope is 12 dB / octave.
EQ
Ƃ Lo-Shelv_Q
symmetric low frequency filter with shelving
characteristic
The level at the adjustable cut-off frequency
is half of the adjusted gain / attenuation; the
slope depends on the adjustable quality fac-
tor
Ɓ Low Pass_1
low pass filter of first order with an attenua-
tion of 3 dB at the cut-off frequency and a
slope of 6 dB / octave
Ɓ Low Pass_2
low pass filter of second order with an atten-
uation of 3 dB at the cut-off frequency and a
slope of 12 dB / octave
Ɓ Low Pass_Q
) low pass filter with variable quality factor
). A change is effec-
Byp=On
) it is not
EQ-5
to ) and confirm
EQ-1 Ƅ
Peaking_Eq
)
Ƅ
) is shown on
(Peaking Equalizer)
(High Shelving Filter 1)
(High Shelving Filter 2)
(High Shelving Filter Q)
(Low Shelving Filter 1)
(Low Shelving Filter 2)
(Low Shelving Filter Q)
(Low Pass Filter 1)
(Low Pass Filter 2)
(Low Pass Filter Q)