In terms of music and culture, the Sahara is like an inland sea, where the sounds, tastes and colours of peripheral ‘port’ cities like Marrakesh, Sijilmassa, Timbuktu, Agadez, Ghardaia, In Salah, Ghat, Ghadames, Tunis, Tripoli, Siwa, Cairo, Walata, Chinguetti, Djenné and Kano have mingled for centuries.