By the end of 80s, several metal groups formed in Turkey such as Mezarkabul (Pentagram), Diken, Volvox and Dr. Skull.
Hakan Utangaç (born 1965 in Istanbul) is the guitarist of heavy metal band Mezarkabul (known as Pentagram in Turkey).
Another example, Mor ve Ötesi's groundbreaking album Dünya Yalan Söylüyor was produced by Gözübüyük.
Cenk Ünnü (born 1967 in Istanbul) is the drummer of the heavy metal band Mezarkabul (also known as Pentagram).
Tarkan Gözübüyük, bass guitarist for Turkish heavy metal band Mezarkabul
As a producer, he contributed to the albums of famous Turkish rock artists like Şebnem Ferah, Özlem Tekin, Teoman, Demir Demirkan, Ogün Sanlısoy (the former vocalist of Mezarkabul) and bands like Knight Errant, Kül, Mor ve Ötesi and Athena.