(AP) With its riveting orchestration, definitive guitar play and signature sensual baritone vocals, Isaac Hayes’ theme song for the 1971 movie “Shaft” not only became one of pop music’s iconic songs, but also the defining work of Hayes’ career.

Yet the “Theme from Shaft,” which would earn both Grammys and an Oscar, was just a snippet of the groundbreaking music for which Hayes — who died Sunday at age 65 — was responsible.

He penned soul classics like “Hold On I’m Comin”’ for Sam & Dave, helped usher in the era of disco and was a goldmine for countless hip-hop and R&B artists who used his illustrious arrangements as the focal point for their songs decades later.

“Isaac Hayes embodies everything that’s soul music,” Collin Stanback, an A&R executive at Stax, told The Associated Press on Sunday.

“When you think of soul music you think of Isaac Hayes — the expression ... the sound and the creativity that goes along with it.”

His influence also extended beyond music. His trademarked bald head, full beard and muscular frame, often adorned with a multitude of gold chains, made him a fashion trendsetter at a time when most of his contemporaries were sporting blowout Afros. He was also a symbol of black pride, and an activist for civil rights.