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⑮
Window of the input equalization "Inputs EQ"
(dB); the slope depends on the adjustable
quality factor (Q).
Lo-Shelv_Q / LoSHF Q (Low Shelving Filter Q)
Symmetric low frequency filter with shelving
characteristic
For the adjustable cut-off frequency (Hz), the
level is half of the gain/attenuation adjusted
(dB); the slope depends on the adjustable
quality factor (Q).
1) Use the upper button (here, "PEAK
EQ") to call up a dialog window,
and then select the filter type.
2) Use the slider to adjust the level
boosting or the level attenuation.
3) In the field "Hz" beneath the slider,
enter the filter frequency.
4) Enter the filter quality factor (Q) or
the relative bandwidth value (Bw)
in the corresponding field or set
them
by
beneath
entered will be rounded to the
nearest value possible.
⑯
"EQ"
5) To deactivate individual filters, click the but-
ton "Byp". The button will appear in red. To
activate the filter, click the button again.
6) To reset the gain values (0 dB) of all filters of
the input, click the button "Flat Eq". In the dia-
log window "Flat Eq – Are you sure?" that
appears, confirm or cancel the procedure.
7) Use the button "Exit" to exit the equalization
function.
Note: Alternatively, the level boosting/attenuation and
the filter frequency can also be adjusted graphically
(
chapter 6.4.5.1).
6.4.5.1 Frequency response
The diagram indicates the frequency response
of the input channel, depending on the equaliza-
tion adjustment.
In the upper right of the diagram, the type of
representation can be selected: magnitude fre-
quency response ("Mag") or phase frequency
response ("Phase").
Click the button "Show cursor" to show a
graphical reference point (
curve for each filter (fig. 15). Use the mouse to
move the reference points and thus to graphi-
cally adjust the frequency and the level boosting/
level attenuation of the filters.
Click the button "Show cursor" again to hide
the reference points.
6.4.6 Feedback suppression (FBK)
If the signal level "Mic" has been selected for an
input, the function "FBK" under "Sel Fbk/ EQ"
may be used (fig. 14) instead of the equalization
function. The function "FBK" is an effective algo-
22
rithm based on a frequency shift for feedback
suppression that allows users to adjust higher
volumes for speech applications without having
any interfering howling sounds.
adjust the level of the frequency shift: the higher
the value, the more effective the feedback sup-
pression.
6.4.7 Phase reversal
The signal of the input can be reversed. This
may, for example, counteract phase cancella-
tions that occur when two microphones are
located in different directions to/ distances from
the same sound source. A tick in the box "Phase
180°" indicates that the signal is reversed. Click
the box to deactivate the phase reversal function.
6.5 Configuring outputs
clicking
the
arrows
The signals of all outputs take the processing
the
fields.
Numbers
path shown in figure 5. The view "Routing" is
used to assign the input signals to the outputs;
the other settings of the outputs, however, are
defined in a separate view for each output chan-
nel.
that multiple outputs can simultaneously be set
to the same values.
6.5.1 Assigning/ Mixing input signals
1) To assign the desired input signals to each
2) Use the matrix "Output Routing" to select the
3) Use the slider under "Editing mix routing" to
,
,
) next to the
4) To remove all assignments, click the button
Colour lines in the view "Overview" (
indicate the channel assignments.
Use the slider "Input Feedback Speed %" to
Outputs may be linked (
chapter 6.8) so
output and to define their mixing ratio, select
the view "Routing" (fig. 17).
input signals that are to be assigned to an
output channel. Each row of the matrix repre-
sents an input channel, and each column rep-
resents an output channel. Click a node to
assign an input to an output (the square
located at the node will appear in red) or to
remove the assignment.
attenuate the level for each assigned input
signal by up to 30 dB (the attenuation will only
apply to this output channel). Thus, different
signal mixing ratios for the outputs can be
defined. Clicking a node in the matrix will
automatically select the control group of the
corresponding output; alternatively, the out-
put may also be selected by means of the
buttons "Output Selected".
"Reset" and then confirm the confirmation
message.
6.5.2 Signal delay
Each output signal may be delayed by up to
380.998 ms. Thus, different sound delay times
due to different speaker distances may be bal-
anced.
In the view of an output (e. g. "Output1", fig. 18),
under "Delay", set the delay for the output signal.
The unit (meter or milliseconds) can be changed
in the view "Overview" (
To change the delay value, click the arrows
next to the input field. Use the arrows above
"Adj" for a coarse adjustment and the arrows
above "Fine" for a fine adjustment. Alternatively,
enter the value in the field. The value entered will
be rounded to the nearest value possible.
Use the button "Bypass" beneath the value
field to temporarily deactivate the delay; the but-
ton will appear in red. To activate the delay, click
the button again.
6.5.3 High pass filter and low pass filter
Each output is provided with a high pass filter
and a low pass filter that, in combination, may
assume the function of a crossover network (for
frequency-dependent splitting of an input signal
to two or more output channels).
In the view of an output (e. g. "Output1", fig. 18),
under "High Pass Filter" and "Low Pass Filter",
set the high pass filter and low pass filter
desired.
1) Under "High Pass Filter", in the field "Slope",
select one of the eight filter characteristics or
"Bypass" to bypass the high pass filter. The
following filter characteristics are available:
Buttw -6dB
Butterworth filter of first order with a slope of
6 dB / octave
Buttw -12dB
Butterworth filter of second order with a slope
of 12 dB / octave
LRiley -12dB
Linkwitz-Riley filter of second order with a
slope of 12 dB / octave
Bessel -12dB
Bessel filter of second order with a slope of
12 dB / octave
Buttw -18dB
Butterworth filter of third order with a slope of
18 dB / octave
Buttw -24dB
Butterworth filter of fourth order with a slope
of 24 dB / octave
LRiley -24dB
Linkwitz-Riley filter of fourth order with a
slope of 24 dB / octave
Bessel -24dB
Bessel filter of fourth order with a slope of
24 dB / octave
2) Under "Low Pass Filter", in the field "Slope",
select one of the eight filter characteristics or
"Bypass" to bypass the low pass filter.
3) In the fields "Frequency [Hz]", enter the cut-
off frequency desired.
The settings are also reflected in the frequency
diagram (
chapter 6.5.4.1).
6.5.4 Equalization
For the equalization of the individual outputs, five
independent filters are provided. These filters
can be set in the view of an output (e. g. "Out-
put1", fig. 18, under "EQ"). The procedure for
setting the equalization filters is identical to that
fig. 13)
for setting the input channel filters (
6.4.5).
chapter 6.3.1).
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