What Are LPF and HPF?

If you have ever stepped up to a sound board you’ve probably seen a few knobs labeled HPF and LPF. What do those mean?
HPF and LPF stand for High Pass Filter and Low Pass Filter. Some boards have just a HPF, while some boards, especially digital, give you both. A HPF allows high frequencies to pass through, meaning it will filter out low frequencies. Some consoles have a HPF button that has a set cut at 120 or 150hz. A HPF can really help clean up vocals or instrumentation that doesn’t have a lower frequency.
A LPF does the exact opposite. It allows lows frequencies to pass through and filters out high frequencies. This is a great tool for instruments like a bass guitar or a kick drum to clean give a clean low end to your mix!
It's a simple tool anyone can use! Try it out and see the difference it can make in some of your mixes!