A Parametric EQ (Equalizer) is an audio processing tool that allows users to adjust specific frequency ranges in a sound signal. It provides control over three main parameters: frequency, gain, and bandwidth (or Q factor). This enables precise tuning of audio, helping to enhance or reduce certain sounds, making it useful in music production and live sound settings. By using a Parametric EQ, audio engineers can effectively shape the tonal quality of recordings or live performances. For example, they can boost bass frequencies for warmth or cut harsh treble frequencies to create a smoother sound. This flexibility makes it a popular choice for both professionals and hobbyists.