Joe "King" Oliver (May 11, 1885 ? April 10, 1938) was a jazz cornet player and bandleader. He was particularly noted for his playing style, pioneering the use of mutes. Also a notable composer, he wrote many tunes still played regularly, including "Dipper Mouth Blues", "Sweet Like This", "Canal Street Blues", and "Doctor Jazz". He was the mentor and teacher of Louis Armstrong. His influence was such that Armstrong claimed, "if it had not been for Joe Oliver, jazz would not be what it is today".