Descript's low-pass filter (also known as a "hi-cut" filter) allows you to trim out high-frequency audio from your media clips. This can be useful in situations where electromagnetic interference (say from a cellphone close to your microphone) may have gotten onto a recording.
If you haven't yet already, check out our Effects Overview for details on adding / removing effects, as well as a breakdown of the various stages you can insert effects into your Composition.
Unlike a High Shelf EQ which equally raises / lowers any frequencies above a specified value by the amount you specify, the Low-Pass Filter gradually "rolls-off" (removes) any frequencies below the specified value.
The High-pass filter comes with an array of starter presets to choose from:
- Nyquist Filter
- AM Talk Radio
- AM Music Radio
- FM Radio
- Hearing Range of Owls
- Hearing Range of Elephants
- Hearing Range of Goldfish
- Hearing Range of Tuna
To choose a preset click the "Select Preset" dropdown selector:
Manually Adjusting Effects Settings
You can also manually adjust your settings by clicking on the Show Details button to the right of the preset selector:
Here you can adjust the "Frequency" knob to the left / right to set at which point the roll-off will begin.