Sonus Festival announces five day fixture, cream of the underground dance crop comes to Croatia Sonus Festival announces a five day romp of underground dance music, led by Richie Hawtin, Dixon and a 50-strong armada of artists. Related Posts: Seismic Dance Event shares in-person lineup with Tchami, Charlotte de Witte, SIDEPIECE, and more Richie Hawtin shares 1996’s ‘CONCEPT 1’ album 25 years after original release