Understanding the Hysteresis Control in GateEx

When using the GateEx feature in BIAS Mastering Perfection Suite, you’ll notice a knob labeled “Hysteresis,” which comes after the Hold Knob. Actually, the Hysteresis control is quite similar to the Hold control in its practical application of helping to avoid or eliminate chatter, but achieves this in a different way. Rather than simply maintaining the gate’s open position for a user-specified duration, the Hysteresis control allows users to set independent threshold levels for opening or closing the gate by specifying the difference between them in decibels. With this approach, the gate opens when a primary threshold level is exceeded by a suitable signal level, and closes again only when the signal level drops below a secondary threshold level. By default, the Hysteresis Knob is set to 0dB, and has a range of 0-10dB.