Klavier [Sonata in F minor, Op. The Hammer Klavier Trio (HKT) was founded in 2002. In May 2011, Mario Ramos was seen in the Hamburg musical "Revolver im Klavier". Apollo's rival is prosecutor Klavier Gavin, who is Kristoph's younger brother. He authored articles for the IEICE, Music Technology, Electronic Music Educator, and Klavier. This was followed by "Tied up" ft. Steven Klavier, "Juanita" ft. His name is derived from the German word "klavier" meaning piano.