Rap — so many words, so little said. What rap did that was impressive was to show there are so many tone-deaf people out there. All they need is a drum beat and somebody yelling over it and they're happy. There's an enormous market for people who can't tell one note from another.

Reported in Jon Blistein, "Keith Richards: Rap Is for 'Tone-Deaf People'", Rolling Stone (September 3, 2015).

Keith Richards: Rap Is for 'Tone-Deaf People' | Rolling Stone[rollingstone.com]