3.3

Dynamic parameters

The section in the top-left corner of the FabFilter Pro-C user interface is where the conventional compression settings can be found: input gain and panning, threshold and ratio. These determine the dynamic behavior of Pro-C. For in-depth background information on these settings, see Compressor basics.

• Knee
  The Knee switch chooses between a custom soft knee that is different for each compressor style, or a simple hard knee. You can view the resulting transfer function in the transfer function display.
• Style
  FabFilter Pro-C comes with 3 different styles of compression: Clean, an allround, low distortion, feedforward, program dependent, soft knee style; Classic: a vintage, feedback, very program dependent style; and Opto: a relatively slow, very soft knee, more linear opto style.
• Input
  The Input knob controls the amount of input gain that is applied before the input signal enters the compressor. If Expert mode is active, it is also possible to pan the input signal.
• Threshold
  The Threshold knob sets the threshold at which compression begins. Lower thresholds give heavier compression.
• Ratio
  The Ratio knob sets the amount of compression. At a ratio of 10:1, just one dB of output signal above the threshold remains for every 10 dB of input signal above the threshold. You can click on the small dots around the Ratio knob to jump to certain fixed ratio amounts. If you move the knob completely to the left (1:1), no compression will take place. If you move it completely to the right (infinity), everything above the threshold will be completely compressed away, making Pro-C act as a limiter.
  

Next: Time parameters

See Also
Compressor basics
Overview