Reference Guide

937

ProChannel (Producer only)

PC4K S-Type Bus Compressor mode

Figure 277. PC4K S-Type Bus Compressor.

A. Compressor mode toggle B. Clipping LED C. Compressor enable/disable D. VU meter E. Release

F. Make-up gain G. Attack H. Threshold I. Sidechain High Pass filter J. Sidechain enable/disable K. Ratio

L. Dry/Wet level

When PC4K S-Type Bus Compressor mode is enabled, the Compressor module contains the

following controls:

• Compressor mode. Toggles between the two available compressor modes:

• PC76 U-Type Channel Compressor (labeled 76).

• PC4K S-Type Bus Compressor (labeled 4K).

• Clipping LED. Shows if the input signal to the Compressor module is clipping. If there is any

distortion in the ProChannel signal chain, the clipping LEDs let you identify where the clipping

occurs.

• Compressor enable/disable . Enables/disables the Compressor module.

• VU meter. Shows the amount of gain reduction.

• Thresh. Sets the level at which compression occurs. If the input signal level is below the

threshold, no compression takes place. If the threshold level is reached, compression (i.e.

automatic gain reduction) occurs, reducing the gain of the input signal according to the Ratio,

Attack and Release settings. The valid range is -30 dB to +20 dB, and the default value is -10 dB.

• Attack. Adjusts the time it takes the compressor to respond to the input signal after the

threshold level has been reached. A fast attack setting means that compression will be more or

less instant. Using a slower attack setting results in the compression being gradually increased,

allowing for more variations in the signal than the fast setting. Attack should be adjusted

according to the nature of the audio material. The valid range is 0.1 milliseconds to 30

milliseconds, and the default value is 0.8 milliseconds.

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