Sónar is an annual three-day music festival held in Barcelona, Spain. It is described officially as a festival of Advanced Music and Multimedia Art. Music is by far the main aspect of the festival. The festival runs for three days and nights, usually starting on a Thursday in the third week of June. The seventeenth edition of the Sónar festival was held on 17, 18, & 19 June 2010. Annually there are around 80,000 visitors to the festival. The official website describes the festival as 'Three days and three nights in touch with the most up-to-date developments and featuring the most relevant national and international artists.' 'Sónar is the essential meeting point for an alert public, cutting-edge artists and the most influential professionals from the sectors of music and modern arts.' Sonar has a partnership relation with SonarSound Tokyo.