He made me play a song for him once with one finger. I was playing it with a lot of flash, and he said, “Wait a minute. I just want to hear the song.” I’d taper it out and cool it more and more, but finally he grabbed one finger and said, “Play me the song with this finger!” Now, that’s hard to do. You can play Moon River with one finger, no problem. But try and play some funk tune, with no melody and no real content, with one finger. You can’t do it.
~ David Foster, relating a conversation with Quincy Jones