that is a little bit difficult though without having preknowledge, best gained from reading. because if you hear a track doing a sound youve never heard, how will you know what genre it is? youll be left saying thats one of those womba womba wombas, thats a rappity-rap, thats a oh-ah etc. yeah, but what better way to learn what something sounds like than actually listening to it? further to the link i posted, also check out the classics of each genre.