Yüksek Sadakat (High Fidelity) was formed by Kutlu Özmakinaci, compser and bassist, as "Filinta" in 1997 and then in 2005 with the attendance of Kenan Vural (Vocal), Serkan Özgen (Guitar), Ugur Onatkut (Keyboard), Alpay Salt (Drums) the band got its last shape. They released their first album, has the same name with the band, in 2006 and the hit song of the album, "Belki Üstümüzden Bir Kus Geçer", had a great success and became the most played song by Turkish Radio channels in 2006. The nationwide success of Yüksek Sadakat continued with their second album "Katil & Maktül". Songs from this album "Ben Seni Arayamam", "Ask Durdukça", "Haydi Gel Içelim" and "Katil & Maktûl" are the songs that took the first place at the lists.