Pop. Indie. Electronica. Soul. Do these words mean anything any more? Switch on the radio and you could be mistaken for thinking that genres have blurred into one. But dig deeper and you'll find that there are more than ever. Here, we present a glossary of 2012's essential musical movements (and only a few are made up by us). Plus, a chance to sample tracks from 25 of the 26 genres mentioned in Spotify (Tumblrwave is just too damn new).
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