A high-pass filter reduces low frequencies below its cutoff while leaving higher content mostly intact.
Definition
Letting highs pass
A high-pass filter, often called an HPF, attenuates frequencies below a chosen cutoff. Engineers use it to remove rumble, plosives, handling noise, or unnecessary low-end buildup.
The cutoff frequency and slope decide how much low content is removed and how quickly the filter takes effect.
Caution
Cleanup can become thinning
High-passing every channel by habit can make a mix smaller, especially when sources rely on low-mid weight for body.
Set the filter while listening in context, then bypass it to confirm the source improved rather than simply got brighter.
Mix
Protect headroom and translation
Controlled low-end leaves more room for kick, bass, and master headroom. It can also reduce low-frequency masking that makes small-speaker translation harder.
Meter Core helps you watch peak and loudness changes when filtering removes energy that meters may show before your ears notice.