API Audio The Channel Strip - Manual (Page 16)

4.2.4.2 NEW: Feed-Forward Compression
In a feed-forward compressor, the RMS detector normally gets its signal from a split of the
input signal. (The detector path can alternately get its signal from a Side Chain Input.) 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.
4.2.5 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.
KNEE: Selects the response curve at the onset of compression.
• SOFT: Rounded response curve (default setting with switch disengaged)
• HARD: Sharp response curve (switch engaged)
• Illuminates when engaged
15