Its earliest incarnation was heard in the late 1960s through the mid-1970s by acts such as the Jimi Hendrix Experience ( later work \ / Band of Gypsys ) , Eric Burdon and War , Ike and Tina Turner , Trapeze , Black Merda , Parliament-Funkadelic , Betty Davis and Mother 's Finest .
Its earliest incarnation was heard in the late 1960s through the mid-1970s by acts such as the Jimi Hendrix Experience ( last two albums ) , Eric Burdon and War , Trapeze , Parliament-Funkadelic , Betty Davis and Mother 's Finest .