Buss compressor architecture, 2 buss compressor architecture – Sonnox Oxford Dynamics User Manual
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11.2 Buss Compressor Architecture
11 BUS COMPRESSOR (TDM AND AAX DSP ONLY)
11.2 Buss Compressor Architecture
The Buss Compressor employs common sidechain processing to all buss contributions
simultaneously. This avoids unwanted modification to panning and balance during
compression gain changes, but it does mean that parameter settings will apply to all main
busses and increased level on any buss will result in increased compression on all
outputs.
The Sub channel is treated differently, in that the contribution the Sub channel makes to
the overall compression and the effect that overall compression has on the Sub channel
are both under user control. This means that you can have the Sub channel contributing
to the common sidechain but its own signal is not compressed. Or you can arrange the
Sub channel signal to be compressed but exclude this signal from the common sidechain
to avoid ‘pumping’ during loud LF passages. Or you can exclude the Sub channel from
both the sidechain and compression so that it operates independently. The controls allow
any proportional combination of these conditions to be set up as illustrated below.
L, C, R, LS, RS INPUT
X
MAIN BUS GAIN CONTROL (DCA)
L, C, R, LS, RS OUTPUT
+
COMPRESSOR
AND LIMITER
SUB CHANNEL INPUT
SUB FILTER
X
SUB CHANNEL GAIN CONTROL (DCA)
SUB CHANNEL OUTPUT
SUB TRIM CONTROL
SUB PASS CONTROL
The SUB TRIM control sets the amount that the Sub signal contributes to the compressor
sidechain. And the SUB PASS control sets the amount that the overall compressor
sidechain will affect the Sub channel output signal.