LD Systems LD DS21 Manuel D'utilisation page 11

Filter characteristics
High Pass
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3-BAND EQUALIZER
3-band fully parametric equalizer with bypass function for each band. Click the frequency, amplification or bandwidth button to open the
edit window and make the required settings. Click FLAT to bypass the corresponding equalizer band (ticked box = bypass activated).
Switching to the filter characteristics Low Shelf, High Shelf and Peak Filter requires amplification to be set to 0 dB (Set 0 dB button).
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Level setting for the channels left and right / subwoofer channel
Use the virtual fader to set the desired level, or enter the value directly in the input field via the keyboard (double click on the input field,
enter value, press Enter).
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MUTE
Mute the channels left and right or the subwoofer channel. Click on MUTE to mute the corresponding channel (ticked box = mute activated)
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180
Set the polarity of the channels left and right, or the subwoofer channel. Click on 180 to invert the polarity of the corresponding channel
(ticked box = inverted polarity).
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Limit
Activate the limiter and set the threshold value and hold time of the channels left and right, or the subwoofer channel. Activate the limiter
and select the desired threshold value (Threshold) with the virtual arrow button, or enter the desired value directly in the input field via the
keyboard (double click on input field, enter value, press Enter, off = limiter deactivated, threshold value -40 dBu to 10 dBu). Use the same
procedure to set the limiter's Hold Time (10–1000 ms).
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Delay
Set the signal delay for the channels left and right or the subwoofer channel. Select the signal delay with the virtual arrow button or enter
the desired value directly in the input field (ms) via the keyboard (double click on the input field, enter value 0–12.5 ms in steps of 0.1 ms,
press Enter). Input can also be entered into the input fields for distance in meters (m) or feet (ft).
Low Pass
Cut-off frequency
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