There are plenty of audio terms out there that can confuse beginners who are entering the world of audio recording and mixing. The obscure terms can cause a lot of issues with learning basic skills, and can often discourage students of the craft. Have no fear, because not all terms are difficult. In fact, the term/tool that I will cover today is one of the simpler ones.
The noise gate is a useful tool in audio recording. Just like the gate that your father built in order to keep the pesky neighbor kids out of your yard, the noise gate keeps out noise. The noise gate works automatically (when turned one) and effectively keeps unwanted noise out. Any beginner should know that “noise” is unwanted, and often times for a beginner it can be hard to overcome.
Usually a noise gate will have two options. Ready? This is where it gets tricky. The two options are (que the drum roll) open, or closed. When a noise gate is closed no signal will get through, not even your vocal or any other instrument. When it is open, the signal will be picked up, but so will any noise in the room. With that being said, it is always best to keep noise at a reduced level. Be careful, a noise gate could actually work against you if the unwanted noise is loud enough.
For this reason, the noise gate has a threshold which works much like a compressor. The noise won’t pass the threshold if it is set correctly, but your intended signal will happily open the gate. The threshold is a key factor, so take some time to experiment.
If you are new to working with a noise gate ask a question, or reply with some advice of your own!