Matisse & Sadko return to MONOMARK with long-awaited new single 'Harmony'. Renowned duo Matisse & Sadko are back on their imprint MONOMARK with their highly anticipated new release, 'Harmony'. Once again, the brothers showcase their signature Progressive House sound-powerful, melodic, and emotionally charged. A captivating vocal line elevates the track even further, making it impossible not to sing along and move to the rhythm.