This guest post was written by David Hyman , a self-proclaimed music junkie and CEO and founder of MOG, a startup that offers both a premium music service and a portal of music content. Before starting MOG, David served as CEO of Gracenote, the world’s largest music database and music-identification service, which sold to Sony for $260 million in 2008. Previously, he was SVP of Marketing at MTV Interactive, and he co-founded Addicted to Noise, the webzine that pioneered multimedia music reporting and around-the-clock music news. In 2008, he founded Musica Tecnomica, a regular gathering of music-focused innovators in San Francisco. Dalton Caldwell , founder/ex-CEO of imeem, recently gave a presentation at the Y Combinator Startup School on the impossibility of creating success in digital music. I’d like to provide an alternate point of view and make it clear that, like in any business, “making it” requires know-how, hard work, diligence and passion.