Summer Sound Festival is an electronic music festival that is held in Liepāja, Latvia. It has been organized since 2012 by Heikki Liimatainen and Alex Kunnari - the founders of Summer Sound Festival Oy. However, the very first festival was held on 2011 at Suvilahti, Helsinki before it became a brand. It was just one day event. In 2014, Summer Sound Festival was considered the biggest EDM festival in Northern Europe.