Al Jardine is a flutist.
Alan Charles Jardine ( born September 3 , 1942 ) is an American musician , singer and songwriter who co-founded the Beach Boys . He is best known as the band 's rhythm guitarist , and for occasionally singing lead vocals on singles such as `` Help Me , Rhonda '' ( 1965 ) , `` Then I Kissed Her '' ( 1965 ) and `` Come Go with Me '' ( 1978 ) .