Behind the scene of San Francisco Start-up Soundtracker. Soundtracker makes it easy to discover and play the music your friends and your neighbors are listening to in real time. Use Soundtracker to comment on your friends' stations, chat, check their latest music, and more. Discover your city's favorite artists. Access any artist, any genre from the largest music catalog on Internet radio with more than 10M songs for FREE. Create your own radio stations and share them with your friends via Facebook, Twitter and Foursquare.