Sonar is a Warsaw-based Polish band, consisting of producer Lukasz Stachurko (one half of RYSY), drummer Rafal Dutkiewicz, pianist Artur Boguslawski and debuting vocalist Lena Osinska. Fascination with trip-hop as well as sensual electronic music resulted in a truly original sound. The use of only Polish lyrics, live drums, a string quartet, many special guests and above all Lena's vocals is what makes their 2016 album Petle so unique.