'I didn't give a damn if it didn't sell': how Isaac Hayes helped create psychedelic soul

• The genres’ first flirtation came courtesy of The Chambers Brothers, whose 1968 chart hit Time Has Come Today used a fuzz-toned guitar, ominous tick-tock effects and echoing reverb to create a portentous, 11-minute trip into the unknown. Sly and his Family Stone extended the link between the genres the next April with their 13-minute soul jam Sex Machine, but only Isaac Hayes had the vision and moxie to create the first album-length marriage of soul’s roots and psychedelia’s ambition. When Hayes released Hot Buttered Soul in September of 1969, it ripped apart the rules for what kinds of music black artists could market.