A compressor is an essential tool in shaping your sound, particularly for controlling the dynamic range of your instrument. It works by reducing the volume of louder sounds while boosting quieter ones, resulting in a more balanced and consistent tone. This effect can add sustain to notes and smooth out any harsh volume spikes, making the overall sound more polished and professional.

When used on guitar or bass, a compressor can tighten up your performance and help your instrument sit better in a mix. Controls on a typical compressor pedal include Threshold, Ratio, Attack, and Release, which allow for precise control over how much compression is applied and how it reacts. Popular compressors include the MXR Dyna Comp, Keeley Katana Blues Driver, and Electro-Harmonix Soul Preacher.