Filter
Definition
A circuit or algorithm that removes or attenuates specific frequency ranges from an audio signal. Common types include high-pass, low-pass, band-pass, and notch filters.
In Simple Terms
Removes certain frequencies from a sound. A high-pass filter cuts the rumble below a certain point; a low-pass filter removes the harshness above. Basic but essential for cleaning up any mix.
In Practice
A low-pass filter on a synthesizer pad removes high-frequency content to create a warmer, darker texture in the mix.