David Ogilvy

Hammer down product fundamentals first. Make sure you've got something that works before doubling down on promotion and marketing. Create a groundswell of organic support, and only then leverage PR and advertising to spread the word.

With music, there's a conversation happening. You're hearing what's going on right now, with people's emotional states, in a communal way, and listening to that is really - it's both informative and so generous. It's like emotional news.