Philadelphia soul was smoother than traditional soul, strongly influenced by Phil Spector's wall of sound production. In the mid-1970s, the Delfonics career declined sharply and the band was effectively over by 1975. Their music enjoyed a mild renaissance in the mid-1990s when Quentin Tarantino used "La La Means I Love You" and "Didn't I (Blow Your Mind This Time)" in a pivotal role in the film Jackie Brown.