Hello, guys!
Heavy metal is a rock genre that developed in the late 1960s and early 1970s in the United Kingdom and the United States. Its roots are blues-rock and psychedelic rock.
Ref: https://homoliteratus.com/literatura-e-heavy-metal-como-se-entrelacam/
The bands that created heavy metal developed a massive, full-bodied, robust sound, characterized by a saturated and distorted timbre of the amplifiers, by the bass guitar strings to create riffs and by the exploration of sounds in minor keys, giving a dark air to the compositions.
Personally, I really enjoy this music genre. It is, perhaps, my favorite due to the intensity of the sound that can be captured in the creation of the songs themselves.