When you use the noise gate, you can't avoid cutting out a portion of the sound you want. A good, robust recording-especially of the human voice - contains audio material at virtually every volume level between absolute silence (that's “minus infinity,” or “-Inf” in digital audio terms) up to your loudest volume peak. First, the noise gate can affect your desired sound material. Sounds simple, right? Maybe, but keep a few important considerations in mind. The effect automatically drops the volume to zero whenever the sound's natural volume drops below the threshold, and the noise disappears. For example, to remove noise at -50 dB, set the noise gate threshold to -45 dB or so.
The noise gate cuts off everything below a certain volume, known as the threshold volume.
