On each Output channel is available a powerful RMS compressor for improving the sound quality,
followed by a Peak limiter useful for limiting the output signal before to enter the amplification
system.
Each, RMS Compressor and Peak Limiter, can be independently set.
The editable parameters can be accessed directly from the RMS Compressor and Peak Limiter sub-
frames, or entering a dedicated window accessible from both the sub-frames pressing the buttons
“RMS Compressor” or “P. Limiter”.
Both RMS Compressor and Peak limiter can be quickly skipped and re-activated by pressing the
“Bypass” button within the respective sub-frames.
RMS Compressor
– from this sub-frame it is possible to set the Threshold, Ratio, Attack Time,
Release Time and “Knee” type of the Output Channels' RMS Compressor.
“
Threshold
”: the selectable range of the RMS Compressor's Threshold is from +18dBu (OFF) to
-12dBu in steps of 0.2dBu
“
Ratio
”: the selectable range of the RMS Compressor's Ratio is from 1:1 (Off) up to 32:1 (Lim) in
steps of 1.
“
Hard/Soft Knee
”
: the selectable range of the RMS Compressor's Knee type is from 000%
(Hard) up to 100% (Soft).
“
Release Time
”: the selectable range of the RMS Compressor's Release Time is from 0.1s to 3s
in steps of 0.1s.
“
Attack Time
”: the selectable range of the RMS Compressor's Attack Time is from 5ms to 200ms
in steps of 1ms - from 5ms to 20ms then 5ms - from 20ms to 30ms then 10ms - from 30ms to
100ms and 20ms - from 100ms to 200ms.
Note
: The RMS Compressor Threshold is defined in dBu, due to the fact that with both, Sinusoid
and Squared wave testing signals, the DPA880 compressed output dBu (RMS) Level is the same
and matching the selected one.
