@SoundSpeck on Instagram: "Tony (Tommy) Iommi is one of the most influential guitarists in rock history and the founding member of Black Sabbath, widely regarded as a pioneer of heavy metal. Early in his career, Iommi lost the tips of two fingers on his right hand in an industrial accident. • To keep playing, he: • Made homemade fingertip prosthetics • Used lighter guitar strings • Downtuned his guitar to reduce tension 👉 This downtuned, dark, heavy sound became the signature of heavy metal. #h