The Smashing Pumpkins are known for their eclectic sound, but some of their fans may be surprised to learn that they were one of the heaviest alternative bands of the '90s.

Billy Corgan discusses this aspect of their sound in a new book, I Am One: The Smashing Pumpkins Story, 1988-1994, which delves into the band's early years and explores how their music evolved over time.

Corgan's vocals underwent significant changes after Siamese Dream, particularly with songs like 'Bodies' and 'An Ode To No One,' according to Brett Buchanan of Alternative Nation.

Buchanan attributes this change in Corgan's singing style to the heavier material tackled by the band on Mellon Collie, citing production and songwriting changes as key factors.

In a recent interview, Max Cavalera of Sepultura agreed that Smashing Pumpkins were one of the heaviest alternative bands of the '90s.

He praised their songs for being both heavy and jam-worthy.

Corgan himself has credited Black Sabbath as an early musical influence and cited Master Of Reality by Black Sabbath as a pivotal album in his development as a musician.

I Am One: The Smashing Pumpkins Story, 1988-1994 is available as paperback, hardcover, and Kindle versions.

Fans of Alcatrazz can catch up with BraveWords Records on YouTube for future videos, including those featuring Bangalore Choir and Crimson Glory.