Four Bars is a jazz quartet known for their nuanced fusion of traditional jazz and modern elements. The band, formed in 2004, consists of notable members John Daniels on trumpet, Sam Anderson on double bass, Leo Martin on drums, and lead by pianist Alex Thompson. They are best recognized for their improvisational style and complex harmonic structures, as heard in impactful works like "Rhythmic Spaces" and "Melodic Echoes". Their contribution to the jazz genre serves as a significant bridge between classic jazz principles and contemporary musical innovation.