

On the other, Angus and Malcolm Young hadn't found their signature guitar tones yet, and most strikingly, Dale Evans sang in a drastically different way from either of the band's better-known vocalists: Both Bon Scott and Brian Johnson are known for high-pitched, raspy singing voices, while Evans had a lower voice that didn't stand out nearly as much from other hard rock singers of the time.

The major influence in their shift was when they hired Robert John "Mutt" Lange as their producer, starting with their Highway to Hell album, the last one with Bon.The difference in style can also be partially attributed to lead singer Bon Scott, who died in 1980. The first album to sound anything like AC/DC as we know them today was Let There Be Rock (1977), and even that had some goofy mid-70s glam influence on it. AC/DC: The songs recorded in the mid-1970s sounded very different from their later hits this was primarily because they weren't quite taking themselves seriously yet, and mostly preferred crude novelty songs (including, most infamously, "Big Balls").It's still regarded as a good album, though.

The production is much rawer, the riffs are for the most part more frantic and less structured, and very few of the band's trademark elements are present. Aborted's first album The Purity of Perversion sounds very, very little like their future releases.
