“…In less distorted rock styles, such as blues rock or classic rock, major chords are frequently used (Cope, 2010;De Clercq & Temperley, 2011;Lilja, 2015), whereas in heavily distorted metal genres, most riffs are limited to power chords (Berger & Fales, 2005;Herbst, 2016;Moore, 2001;Walser, 1993). Minor chords are rarely played (De Clercq & Temperley, 2011;Lilja, 2005, p. 20), except in styles such as black metal that deliberately intend to create an unpleasant sound (Hagen, 2011;Reyes, 2013). Such sounds, however, can still be appealing to listeners for aesthetic, musical or social reasons (Berger, 1999;Hagen, 2011;Reyes, 2013).…”