*300 copies limited edition* Eva-Maria Houben (born in 1955) is a German composer, organist, pianist and musicologist. She is a member of the Wandelweiser Group. Her compositions, performed by herself and many other musicians, have been released on CDs and LPs as well as digitally by Edition Wandelweiser and other international labels. On May 15, 2023, composer Takahiro Kuroda (born in 1989) presented the concert "Square of Thoughts Vol. 2: Eva-Maria Houben and Horn + x" in the performance space of Ftarri, Tokyo. Four of Houben’s compositions, mainly works for horn, were performed by horn player Kei Kondo (born in 1989) and Kuroda, who played the upright piano. This CD includes three works from the live recording of that concert: "his master's voice" and "aus den fliegenden blättern eines fahrenden waldhornisten," performed as solos by Kondo; and "lose verbunden," performed as a solo by Kuroda.