What is a peak filter?

A peak filter is a type of electronic filter designed to amplify or attenuate a specific range of frequencies, creating a peak in its frequency response at a designated center frequency. It is commonly used in audio processing to enhance certain tonal qualities or remove unwanted resonances. The filter's bandwidth can be adjusted to control how narrow or wide the peak is, allowing for precise frequency shaping. Peak filters are often employed in equalizers and audio mixing applications.