Digital music service eMusic has a new app out this morning taking a look back at the last year of music. It’s called 2013: The Year In Music, and is a free download for iPhone and iPad, developed in partnership with startup Semi-Linear. “Listen to songs from the year’s best records and see where your favorites placed in our list of the Top 100 Albums of 2013, and dig deeper to find a new favorite with our Hidden Gems,” explains its App Store listing. “Read insightful interviews with five artists who made Giant Leaps in 2013, and learn more about the year’s defining trends in five insightful essays.” It’s actually Semi-Linear’s second music app: the company worked with Snoop Dogg on his Reincarnated: Track Notes app that came out in the spring (Bulletin, 18-Mar-13). The new eMusic app uses the same system of digital ‘cards’, although interestingly, the music streams come from SoundCloud and YouTube, while the Buy It links for the Top 100 Albums lead to Apple’s iTunes Store.