About Sylvan: Note: There are three artists with this name. 1. Prog Rock, German band 2. 60's female pop singer. 3. Low-Fi Dublin Band 1. In the spring of 1990, Kay SÃ¶hl, the two keyboarders Volker SÃ¶hl and Matthias Harder, founded the band TEMPORAL TEMPTATION. By that summer the band had already played its first gig - the first live performance of the core founding members of the band. In a way it was also Sylvan's birth. At this time the band played hard rock music and sang in German. Only a small part of their music was progressive rock.