KSOL AM 1450 San Francisco Aircheck 1967 (4:17 DJ - Sly Stone):
https://www.youtube.com/watch?v=Q2LlPTSu7oo&list=PLkLMg_E_YD64Uw_ZpyGS9oHLeLdfYCn4V&index=2
More Sly spins on KSOL:
https://www.youtube.com/watch?v=Ixz4Fwtc3QA&index=3&list=PLkLMg_E_YD64Uw_ZpyGS9oHLeLdfYCn4V
Sly, Cynthia & Jerry talk about Sly's DJ days:
https://www.youtube.com/watch?v=KOG2GZFcKFs
He also sang along with records (even after they ended!) and recorded his own jingle:
"Sly Stone is my name.
Playing records is my game.
A little bit different every night.
Always out of sight!...
...You will have to move
You'll be in the groove..."
(Sorry, couldn't find a clip of this 1966 jingle!)
He also worked as a staff record producer for Autumn Records, producing for San Francisco-area bands such as The Beau Brummels, The Mojo Men, Bobby Freeman, and Grace Slick's first band, the Great Society.
http://en.wikipedia.org/wiki/Sly_Stone
All this preceded the Family Stone. Truly a genius and, IMHO, a waste of his later life.