BSS Audio OPAL Series DPR-944 Owner's Manual - Manual (Page 32)

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11.0 Application examples - Compressors
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.
11.1 Broadband
(normal)
compression
Rotate the threshold control anticlockwise until the below threshold meter is
fully illuminated, and an appropriate amount of signal loss is indicated on the
gain reduction meter. This operation will be accompanied with a drop in
output level which can be made up by adjusting the gain control.
Final adjustments of the controls can then be made to suit particular
requirements, including the ratio and release controls. The DPR 944 provides
automatic program related dynamics adjustment that will be acceptable for
most general purpose applications. Should a tighter sound be required, depress
the fast release switch. The experienced engineer will be able to set the
compressor controls to near optimum position for any source material with the
Comps In switch out, so that the compressor can be ‘dropped’ into a live
performance without disturbance.
11.2 Peak limiting
With the width control set to out, release fast in, and the ratio set to infinity,
the DPR 944 can be used as an effective limiter. Apply a signal to the DPR
944 input that is at the maximum level required without limiting. Rotate the
threshold control anticlockwise until the peaks of the normal program cause
the gain reduction meter to indicate compressor operation, then rotate the
threshold control back a little so that no operation is indicated. Peaks in the
program that exceed the norm will now be hard limited as the ratio control is
set to infinite. The gain control should be set so that the (limited) output of the
DPR 944 matches that expected by any following equipment.
Application examples - Compressors