 Stockhausen was influential within pop and rock music as well . Frank Zappa acknowledges Stockhausen in the liner notes of Freak Out ! , his 1966 debut with The Mothers of Invention . On the back of The Who 's second LP released in the US , " Happy Jack " , their primary composer and guitarist Pete Townshend , is said to have " an interest in Stockhausen " . Rick Wright and Roger Waters of Pink Floyd also acknowledge Stockhausen as an influence ( Macon 1997 , 141 ; Bayles 1996 , 222 ) . San Francisco psychedelic groups Jefferson Airplane and the Grateful Dead are said to have done the same ( Prendergast 2000 , 54 ) ; Stockhausen himself says the former band included students of Luciano Berio , and the Grateful Dead were " well orientated toward new music " ( Stockhausen Texte , 4 : 505 ) . Founding members of Cologne @-@ based experimental band Can , Irmin Schmidt and Holger Czukay , both studied with Stockhausen at the Cologne Courses for New Music ( Stockhausen Texte , 3 : 196 , 198 , 200 ) . German electronic pioneers Kraftwerk also say they studied with Stockhausen ( Flur 2003 , 228 ) , and Icelandic vocalist Björk has acknowledged Stockhausen 's influence ( Heuger 1998 , 15 ; Björk 1996 ; Ross 2004 , 53 & 55 ) . 
