LOS ANGELES (TheWrap.com) - Spotify brought producer Quincy Jones to launch their new app featuring artist-curated playlists on Tuesday, but the music legend couldn't resist dinging P. Diddy for being musically illiterate while touting the music technology. "P. Diddy wouldn't know a B-flat" if it hit him, said Jones in a conversation with musician Bruno Mars to mark the occasion of the app launch. "P. Diddy has a doctorate in marketing…. He's got clothes companies and Ciroc vodka." The comment came after Jones responded to an audience question with an admonition to "learn your craft. ...