Dan talks to Evan Mader about his photo book, 'Sound of a City: Behind the Music of Philadelphia', which features interviews with engineers and producers, as well as great photos of studios around Philadelphia. Evan talks about growing up in Brookhaven, making beats as a teen, the Drexel University music industry program, his mentor Ryan Schwabe, and how the book came together. You can get the book on Amazon, and be sure to check out Evan's website and his Instagram.