BSS Audio OPAL Series DPR-944 Owner's Manual - Manual (Page 20)

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Application examples - Gates
8.0 Application examples - Gates
Each of the following application examples is accompanied by a front panel
control diagram. Controls that are not highlighted should be set to the value
shown - refer to the text where no initial setting is shown. Those controls
which are highlighted can be set to any value, and are not critical to the
given example. Settings can apply to both channels, but only one is shown
here for clarity.
8.1 Basic gating
Rotate the threshold control to the out position, apply a signal to the main
input and observe that there is no output. Rotating the threshold control anti-
clockwise, you will hear the signal appear, and should see the gate lights
change state. If the signal is only allowed to briefly activate the gate, the
sound will appear 'chopped up'. Adjusting the attack and release controls will
change the nature of the sound. You may find that certain settings of these
controls never allow the gate to close.
Set the threshold so that the gate no longer opens, and now depress the depth
switch. Notice that even though the gate is shut, as confirmed by the gate
lights, you can still hear the program, although it is now 20dB quieter. This
can be useful as having the gate completely closing off the signal can impart
an unnatural character to the sound.
8.2 Frequency
conscious gating
Set the key filter control to 1kHz and the filter narrow switch to out. With a
signal applied to the main input, depress the key listen switch; you should
now hear the program. Depress the filter narrow switch and notice that the
range of the sound changes, becoming more limited.
Leave the filter narrow switch in, and now adjust the key filter control. As you
turn it anti-clockwise, the bass notes will become prominent, clockwise and
you will hear the treble.