A bassline is a musical part that provides the foundation for a song, typically played by instruments like the bass guitar or synthesizer. It usually consists of lower-pitched notes that complement the melody and rhythm, helping to create a fuller sound. Basslines are essential in various music genres, including rock, jazz, and electronic music. In addition to supporting the harmony, basslines often drive the groove of a track, making listeners want to move or dance. They can vary in complexity, from simple repeating patterns to intricate sequences, and are crucial for establishing the overall feel of a piece.