swing in various ways, which evolved as the music developed. During the early development of swing music, the bass was often played with lead-in--main-note couplets, often with a percussive sound. Later, the lead-in note was dropped but incorporated into the physical rhythm of the bass player to help keep the beat "solid" - the lead-in beats were not audible, but expressed in the player's motion.

Similarly, the rhythm guitar was played with the lead-in beat strummed by the player, but so softly