INa offers routing of the audio-in of your computer to loaded acts/plug-ins.
At the top of the act you have a build in noise gate.
~thresh: off (through) at threshold=0. Reasonable settings between 0.1 and 0.2.
~gainw: auto-gain-watch-function to avoid clipping.
~link: links "right" slider to the "left" slider.
Select you input channels to the left of the input gain sliders.