Music streaming services unleash a torrent of digital playlists

Other than solving the huge problem of fair compensation for musicians, the key question facing Beats Music, Pandora, Spotify, Rhapsody, Rdio and others is how to rein in the confusion. All are committing much time and online real estate to exploring new avenues of doing so, many of which tap into our desire for music that reflects, enhances or adjusts how we’re feeling. Through mood-based playlists that compile sounds from across eras, companies are in a race to see who can best connect with a listener’s current emotional state, activity or life circumstance. – Randall Roberts,Los Angeles Times