Editing Heavy metal music (section)

====Harmony====
One of the signatures of the genre is the guitar power chord.<ref>Walser (1993), p. 2</ref> In technical terms, the power chord is relatively simple: it involves just one main [[interval (music)|interval]], generally the [[perfect fifth]], though an [[octave]] may be added as a doubling of the [[Root (chord)|root]]. When power chords are played on the lower strings at high volumes and with distortion, [[Resultant (organ)|additional low-frequency sounds]] are created, which add to the "weight of the sound" and create an effect of "overwhelming power".<ref>{{cite book |last1=Walser |first1=Robert|date=2014|title=Running With the Devil: Power, Gender, and Madness in Heavy Metal Music|page=43 |publisher=Wesleyan University Press}}</ref> Although the perfect fifth interval is the most common basis for the power chord,<ref>See, e.g., [http://www.melbay.com/guitarglossary.asp Glossary of Guitar Terms]. Mel Bay Publications. Retrieved on 15 November 2007</ref> power chords are also based on different intervals such as the [[minor third]], [[major third]], [[perfect fourth]], [[diminished fifth]] or [[minor sixth]].<ref>"Shaping Up and Riffing Out: Using Major and Minor Power Chords to Add Colour to Your Parts", ''Guitar Legends'', April 1997, p. 97</ref> Most power chords are also played with a consistent finger arrangement that can be slid easily up and down the [[fingerboard|fretboard]].<ref>Schonbrun (2006), p. 22</ref>