Lunatic Soul is the solo project of Mariusz Duda, the lead vocalist and bassist of the Polish progressive rock band Riverside. Known for its atmospheric, introspective sound, the project blends elements of progressive rock, ambient, and electronic music to explore deep emotional and existential themes. Lunatic Soul’s music often features haunting melodies, rich instrumentation, and a contemplative mood, offering a distinctive contrast to Duda’s work with Riverside.