From the outset in 2009, the band has been combining radical genres of sharper guitar sound, such as hardcore, punk, metal or crust. In the recent years they added jazz and improvisation to their mix of noisy styles. The jazz elements were brought by sextet’s members who took part in the Zlatko Kaučič’s workshops. The initial line-up of the classic rock trio (vocal and guitar, bass, drums) has changed over the years and is now a sextet with two drummers and a saxophone. In preparing for performing at the 24th edition of the Jazz Cerkno Festival, the band decided to present new songs as well as the new sound, since saxophonist Boštjan Simon and two Italian musicians, trumpet player Francesco Ivone and Giorgio Pacorig on keyboards and synthesizers, joined the original sextet for the concert. In a festival review for the Glasna magazine, Tadej Stolič wrote about Koromač’s performance: “This time, the local and both foreign guests were leaning further into the field of improvised jazz and created a concert that quite shook up our personal understanding of the jazz idiom.”