API Audio The Channel Strip - Manual (Page 17)

4.2.5.1 Soft Knee Compression
SOFT: Rounded response curve
• Gradual onset of compression (fade-in up to the set ratio)
• Similar to an “over-easy” type knee
• More transparent
4.2.5.2 Hard Knee Compression
HARD: Sharp response curve
• Immediate onset of compression (sudden transition to set ratio)
• More aggressive and noticeable
4.2.6 THRUST®
The 527 Compressor includes API’s patented THRUST® circuit that can be switched in or out as
needed. This places the THRUST® filter before the RMS detector that decreases the compressor’s
reaction to low frequency content. The result is a noticeable increase of punch and low
frequencies, but a uniformly compressed signal. It’s the “little more punch” switch!
The THRUST® circuit can be engaged using the THRUST® switch.
THRUST®: Inserts the THRUST® filter before the RMS detector
• Illuminates when engaged
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