Compression Type - API 527 Operator's Manual

API 527 Compressor

COMPRESSION TYPE

G R
METER
V U
I N
LINK
N E W
TYPE
O L D
H A R D
KNEE
S O F T
I N
R
THRUST
IN
OLD: Feed-Back Compression
In a feed-back compressor, the RMS detector gets its signal from the
output of the gain reduction device (VCA). This is how older API 525,
1176 type, and 660 type compressors work. This yields a smoother,
softer, more transparent sound
"OLD" or FEED BACK type COMPRESSION
IN
2510
THRUST
FILTER
Page 8
The 527 Compressor can be set to operate in two circuit
topologies:
· OLD:
Feed-Back
receives the signal from after the VCA
· NEW: Feed-Forward topology: The RMS detector
receives the signal from before the VCA
The compressor circuit topology is selected using the TYPE
switch.
.
2 VCA's
CHANNEL
RMS DET
topology:
PER
THRESHOLD, ATTACK,
RATIO, RELEASE,
LINK CONTROLS
The RMS detector
OUT
2520