„"You can't play anything on a horn that Louis hasn't played." and "I love Pops" (Louis' nickname) … Louis has been through all kinds of styles. That's good tuba, by the way. You know you can't play anything on a horn that Louis hasn't played — I mean even modern. I love his approach to the trumpet; he never sounds bad. He plays on the beat — with feeling. That's another phrase for swing. I also love the way he sings.“
— Miles Davis American jazz musician 1926 - 1991
In the Jazz Review with Nat Hentoff (1958); also in , and in many other books https://www.google.com/search?tbm=bks&hl=en&q=%22play+anything+on+a+horn%22+miles+davis
On Louis Armstrong in a Playboy magazine interview.