The electronic effects may include distortion, doublers, loops, wah-wah, and tone generators.
In addition to playing the Varitone, Eddie Harris had experimented with looping techniques on his 1968 album Silver Cycles.
David Sanborn and Traffic member Chris Wood employed effects such as wah-wah and delay on various recordings during the 1970s.
Rahsaan Roland Kirk often played several saxophones at once (though this technique has earlier roots in Wilbur Sweatman's vaudeville performances.
[1]: 68–69 ), Kirk was also a notable practitioner of circular breathing, allowing him to play lengthy passages without pause.