Mustafa Erkin Koray (Turkish pronunciation: [æɾkin ˈkoɾaj]; 24 June 1941 – 7 August 2023) was a Turkish singer and guitarist who mainly played Anatolian rock.

[3] Koray was active in the Turkish rock music scene since the late 1950s.

[citation needed] In the early 1970s, he formed the group Ter with former members of the band Bunalım.

[citation needed] Koray, alongside Orhan Gencebay, were the inventors of the electro baglama, the electric version of a traditional Turkish musical instrument related to the lute.

[3][4] Koray died on 7 August 2023, at the age of 82, in Toronto, Canada, from lung disease.