Darkglass NSG Noise Gate
They say:
Enhancing quietness
The NSG: Noise Gate comes as a response to these annoyances. Utilizing an adjustable threshold level to filter out sounds below a certain threshold, allowing for only the desired audio to be seized.
Front features
Threshold - Use this push knob to control the threshold of the noise gate. Press the knob to switch between the “Soft” mode (Blue LED color) for softer gain reduction and “Hard” (Red LED color) for the more aggressive gate operation.
Threshold range
From -65 dBV to -30 dBV in “Soft” mode.
From -45 dBV to +5dBV in “Hard” mode.