Filter
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The following settings are available:
• Crossover type
This parameter defines the crossover operation mode, out of four possible ones: Band-Pass (both high pass
and low pass are activated), Low-Pass (high-pass is disabled), High-Pass (low pass disabled), and Off (both
high pass and low pass are defeated).
To edit this parameter, just click on the combo box where it is displayed. Select the desired option by pointing
the mouse on it (it should then appear in blue) and click.
Note that the fields corresponding to disabled functions (e.g. the hi-pass parameters if Low-Pass is selected as
crossover type) are displayed in darker grey.
• Filter type (Administrator mode only)
This combo box lets you choose between Butterworth and Linkwitz-Riley. Remember that for the former type,
frequencies are defined as -3dB points whereas for the latter they are -6dB points.
• Slope
The selectivity of each filter (low pass and hi pass) can be set to 4 possible slopes, displayed in dB per octave
6, 12, 18, 24.
• Frequency
The frequency of each filter can be set individually using the corresponding combo box. To edit one frequency,
click on the arrowed button on the right and a drop-down list of values will appear. You can use the scroll bar to
navigate through the list, point to the chosen value with the mouse and click to confirm. Alternatively you can type
the desired value directly in the frequency box (followed by [Enter]). Note that only integer values are permitted.
4.4. Q-bass
A virtual On/Off button allows to switch the Q-bass section on or off (by-pass).
The Q-bass is actually a parametric equalizer (PEQ), which possible adjustments are:
• Level
Define the level of boost or cut at the center frequency of the Q-bass. The combo box allows to select between
a list of values comprised between -18 and +18dB, in 1dB steps. The values of the list are non editable.
• Frequency
The center frequency of the Q-bass must be in the 10 to 30000Hz the range, values can be selected among
a drop-down list, or typed in directly (followed by [Enter]).
• Q
The Q defines the selectivity of the filter: a low value (≤1) means a non-selective filter, a high value (>1) means
a selective one. The allowed range for Q values is from 0.1 to 9, they can be selected in a list or typed in directly.
4. Setting up the system
(main screen)
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