The Dave Brubeck Quartet was an influential American jazz ensemble formed in 1951, led by pianist Dave Brubeck. The group is best known for its innovative approach to rhythm and time signatures, particularly in their hit song "Take Five," which features a 5/4 time signature. Their music blends elements of classical and jazz, appealing to a wide audience. The quartet included notable musicians such as saxophonist Paul Desmond, bassist Eugene Wright, and drummer Joe Morello. They gained popularity in the 1950s and 1960s, becoming one of the first jazz groups to achieve mainstream success. Their work helped to popularize jazz music across the United States and beyond.