The Marble Index, Desertshore and The End are three of the most uncompromising records of the 60s and 70s, and arguably surpass Nico's work with the Velvet Underground. Matthew Lindsay takes an in-depth look at their history and significance
Rory Gibb takes you on a detailed trip through some of the year's defining tracks in electronic and dance music - from reductionist garage and construction-site ambient to junglist collage and quicklime grime - plus listen to a mix containing all 25 tracks