Cosmosonic is Berk Teker, born in İzmir, based in İstanbul, Turkey. His professional music career has begun as Studio/Live sound engineer after being member in several local bands. Berk recorded albums to respected names in jazz scene and worked with several artists in mainstream music scene in Turkey at production stage. He continued to record and mix live bands in concert venues. Meanwhile in his own studio, he carried on sound design and electronic based music production. Showed up as "Roztal Jiva" at most of the reputable events and festivals made in Turkey. By the beginning of 2013, Berk summed up all the productions he makes under the name of Cosmosonic, and carries on making sounds to films, video games and dancefloors.