Chris Jasper, who helped shape the sound of 1970s funk and soul music as a keyboardist, songwriter and producer for the Isley Brothers, working on Top 40 hits including “That Lady,” “Fight the Power” and “For the Love of You,

Jasper, who passed away Monday at the age of 72, was the musical heartbeat of the Isley Brothers during the most celebrated run of their era-defining sound.

Chris Jasper, a former member of the Isley Brothers who helped the group shape its flamboyant funk-rock sound, has died. The singer-songwriter died Sunday at age 73, his family announced Monday on Facebook,