Spectrum

Sidechain is an audio production technique where the signal from one track controls an effect applied to another — most commonly compression. For example, in electronic music or hip-hop, the kick drum can trigger a compressor on the bass or pads, creating a pumping rhythmic effect. This helps clear space in the mix, emphasize the kick, and add movement to the track. Sidechaining can also be used creatively to modulate a filter, reverb, volume, and more.