A Saucerful Of Secrets and Meddle ( 1971 ) albums of Pink Floyd are considered Drone music .
Pink Floyd : Experimental songs like A Saucerful Of Secrets ( 1968 ) , Ummagumma ( 1969 ) studio album and Shine On Your Crazy Diamond ( 1975 ) part 1* Fripp and Eno : the 21-minute drone ambient of `` The Heavenly Music Corporation '' on No Pussyfooting ( 1973 ) , the 28-minute drone ambient of `` An Index of Metals '' on Evening Star ( 1975 ) .