the beatles' song "you like me too much" has one of the earliest examples of this technique: the beatles recorded the electric piano through a hammond b-3's rotating leslie speaker, a 122 or 122rv, a trick they would come back to over and over again. (at the end of the intro, the switching off of the leslie is audible.) also on "tomorrow never knows" the vocal was sent through a leslie speaker. although it's not the first recorded vocal use of a leslie speaker, the technique would later be used by the grateful dead, cream, the moody blues and others.