New" or feed forward type compression, Api 527 compressor new: feed-forward compression, Knee – API Audio 527 Compressor User Manual

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API 527 Compressor

NEW: Feed-Forward Compression

In a feed-forward compressor, the RMS detector normally gets its signal
from a split of the input signal. With this method, the RMS detector sends
a signal to the VCA that is an exact ratio of the desired compression set
by the RATIO control. This is how many new VCA based compressors
work. This can yield more aggressive compression and a harder, more
affected sound.

TYPE

LINK

KNEE

THRUST

R

METER

VU

GR

IN

NEW

OLD

HARD

SOFT

IN

IN

KNEE

Knee determines the 527 Compressor’s response curve at the
onset of compression.

The 527 Compressor has two (2) knee settings that control
how the compressor transitions into compression:
SOFT: Rounded response curve
HARD: Sharp response curve

The knee of the compressor is selected using the KNEE switch.

IN

OUT

2 VCA's

PER

CHANNEL

THRESHOLD, ATTACK,

RATIO, RELEASE,

LINK CONTROLS

RMS DET

THRUST

FILTER

"NEW" or FEED FORWARD type COMPRESSION

2510

2520

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