It features an exceptionally smooth "soft knee" curve, meaning the compression kicks in gradually, making it nearly impossible to make a mix sound "pushed" or "pumping" in an ugly way. 2. Key Controls & Features Time Constants:
Unlike VCA (Voltage Controlled Amplifier) compressors, which can be transparent or aggressive, a variable-mu compressor changes the bias of its tubes to control the gain. As the input signal gets louder, the tubes conduct less current, reducing the gain. This results in a compression curve that is program-dependent. It doesn't just squash the signal; it shapes it. fairchild 670 waves