Median Music signed a global publishing deal with Osman İşmen for his written and arranged more than 1000 titles since 1976.

İşmen has produced many albums including first samples of turkish psychedelic music; Diskomatik Katibim (Beta Plak, 1978), Disco Madımak (Yonca Plak, 1979), Disco Türkü (Yonca Plak,1980), Disco Maşallah (Türküola,1981), TRT Ara Müzikleri (Oskar Plak, 1986), Disco Gencebay (Kervan Plak, 1987),  Jazz Eastern (Sony Music, 1998), Rakkas (Universal, 2000), Jazz İstanbul (Universal, 2003), Jazz Eastern 2 (DMC, 2006), East Inn (DMC, 2006), Sahara (DMC, 2006). Also his some tracks placed in some compilations like Jazz in World (Fusion, Sony, France, 1999), Buddha Bar 3 (Kale, Wagram, France, 1999), Homegrown Istanbul Vol 1 (Hi-Jazz, Pozitif Müzik, 2008).