Editing Doom metal (section)

=== Instrumentation ===
The [[electric guitar]], [[bass guitar]], and [[drum kit]] are the most common instruments used to play doom metal (although [[keyboard instrument|keyboards]] are sometimes used), but its structures are rooted in the same scales as in [[blues]].<ref name="Bandcamp"/> Guitarists and bassists often down tune their instruments to very low notes and make use of large amounts of [[distortion (music)|distortion]], thus producing a very "thick" or "heavy" guitar tone, which is one of the defining characteristics of the genre.<ref name=PhD>{{cite thesis |last=Piper |first=Jonathan |date=2013 |title=Locating experiential richness in doom metal |type=PhD |institution= [[University of California, San Diego]] |series= UC San Diego Electronic Theses and Dissertations|url=https://escholarship.org/uc/item/7bq7387s |access-date=14 September 2019}}</ref> Along with the usual heavy metal compositional technique of guitars and bass playing the same riff in unison, this creates a loud and [[bass (sound)|bass]]-heavy wall of sound. Another defining characteristic is the consistent focus on slow [[tempo]]s,<ref name="Allmusic" /> and [[minor scale|minor tonality]] with much use of [[consonance and dissonance|dissonance]] (especially in the form of the [[tritone]]), employing the usage of repetitive rhythms with little regard to harmonic progression and musical structure.<ref name=PhD/>