Listening to Black Sabbath’s self-titled 1970 album is a lesson in heavy metal history. Though bands such as Led Zeppelin and Deep Purple influenced the formation of the genre, Black Sabbath is often considered the first true heavy metal band, perhaps because they were the first to devote their focus to the darker themes that became an often controversial element of metal. Robert Plant of Led Zeppelin also has been quoted as saying he thought Black Sabbath was the first true heavy metal band. Living in an impoverished English town where career choices for most were limited to factory worker or criminal, the boys of Black Sabbath could not relate to the idealistic hippie music that was popular when the band formed in 1968, considering themselves a blues band. Guitarist Tony Iommi, observed the lines that formed at the local movie theater whenever it showed horror films and remarked that if people were so willing to pay to be scared, perhaps they should try playing evil-sounding music. With that in mind, they took their name from a Boris Karloff film.
The title track exemplified Sabbath’s goal of capturing horror in music. It began with atmospheric sounds of heavy rain, thunder, and a single, tolling bell. Then Iomi played a slow, ominous riff based on the “devil’s tritone,” an interval notoriously avoided in medieval music because its dissonance evoked a sense of evil - perfect for Sabbath’s purposes. Though speedy, seemingly effortless shredding has become nearly synonymous with heavy metal, the slogging pace of this formative song was truly heavy, creating a feeling of immense weight and pressure intensified by the dread-soaked vocals of Ozzy Osbourne in his prime. The story of being dragged to hell by a figure in black was not conveyed so much by the lyrics as by the despair in Osbourne’s voice when he moaned, “Oh no, no, please God help me.” The song was haunting in a way that most listeners in 1970 had no idea how to process. This dire sound eventually became the primary influence of the doom metal subgenre in the early 1980s. From: https://www.classicrockhistory.com/black-sabbath-album-review/
