The dual channel 562E Windowing Expander/Gate exploits our newly developed proprietary technology to enhance gating and expander control.
Window Advance is a proprietary system for recognizing the signal to be gated. In simple terms, it virtually creates the impossible: a gate that opens just ahead of the audio signal. It creates this impression by moving the statistical energy center of the gated signal forward in time. Window Advance permits the user to subtly delay the signal energy, centering it within the envelope. Through this function, the 562E’s gate passes the entire leading edge of the audio waveform. Window Advance eliminates the noises and chopped-off waveforms created by traditional gates that struggle to open as quickly as possible after the signal arrives.
Here's a link to the manual for all the spec >SYMETRIX<