The Jackson 5 put out at least an album a year from 1969 to 1975, including a three-LP run in 1970—a fast pace that allowed them to test boundaries. While their roots remained in soul, their catalog used R&B as a launching point for exploring music's potential. “It's Too Late to Change the Time” pairs their harmonies with elaborate chamber pop, while a snaky cover of Funkadelic's “I'll Bet You” adds an air of mystery to their glossy sound.