The Urban Buzz sends heartfelt condolences to the family, friends and fans of Earth, Wind & Fire saxophonist Andrew Woolfolk, who was instrumental in defining the disco sound of the 1970s. Andrew has died at age 71.

The musician — who helped create some of the band’s biggest hits, including “September” and “Boogie Wonderland” — passed away Monday following a six-year illness. An official cause of death has not been disclosed.

The sad news was announced by bandmate Philip Bailey, who penned a touching tribute on Instagram.

“I met him in high school, and we quickly became friends and band mates,” Bailey wrote. “We lost him today, after being ill of over six years. He has transitioned on to the forever, from this land of the dying to the land of the living.”

He added: ” Great memories. Great Talent. Funny. Competitive. Quick witted. And always styling. Booski…  I’ll see you on the other side, my friend.”