Bar

In music, a bar — or measure — is a unit of time that groups a certain number of beats, depending on the time signature of the piece (e.g., 4/4 means 4 beats per bar). Bars help structure rhythm and organize music. They are used to mark sections of a song (intro, verse, chorus…) and to align instruments or loops. In digital audio workstations (DAWs), bars are visible on the timeline and are essential for arranging and composing.