Barco Iosono Core R9801500, Инструкция по установке и эксплуатации

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8. Advanced System Tuning With The System Tuning Extension
Image 8-8
Add/Remove/Copy
fi lter kit curve settings
Image 8-9
Filter kit parameters
Image 8-10
Control buttons
8.5 Filter Evaluation
Filters can be evaluated in three different ways:
1. Listen to the system by alternating between applied and bypassed fi lters. To evaluate the fi lters subjectively, observe the whole
frequency range by listening to a musical piece familiar to you. Check the sound at different positions throughout the room.
Compare the subjective sound impression with applied and bypassed
fi lters. Eliminate occurring tonal problems by readjusting
the fi lter creation parameters and applying the new fi lters.
2. Check the fi lter’s frequency response and the resulting frequency response of the speaker visually. To check, whether your
settings lead to the fi lters you are trying to achieve select the speaker of interest in the Measurement tabs’ loudspeaker setup
display by left click. Right click on the marked speaker, select Show fi lter to open the Filter comparison dialog. The upper plot
shows the frequency response of the fi lter calculated for the selected speaker and additional speaker or subwoofer fi lters. The
target curve can be displayed in both diagrams by checking the Show target curve checkboxes at the right. The lower plot
can display the measured frequency response of the selected speakers/ subwoofers as well as the combination of
fi lter and
measurement, which represents the spatially averaged frequency response after applying the fi lters. Check Show sum spectrum
and Show result to show or hide the corresponding curves. Choose the additional speaker/subwoofer using the according drop
down lists on the right. There are two edit
fi elds at the bottom of each diagram to de fi ne the Y-axis boundaries to change the
scaling of the plots.
Note: This dialog will only work when the preprocessing and fi lter creation has already been done at least once for all speakers
and subwoofers in all groups.
3. Measure the response of the fi ltered speaker.
In general
pay attention if the speakers’ performance is improved by the fi lters. Often physical problems of the sound radiation cause phenom-
ena that cannot be corrected by a fi lter e.g. by putting more energy onto problematic frequencies.
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