Joy Division took time to develop their style and quickly evolved from their punk roots. Their sound during their early inception as Warsaw was described as fairly generic and "undistinguished punk-inflected hard-rock". Critic Simon Reynolds observed how the band's originality only "really became apparent as the songs got slower", and their music took on a "sparse" quality. According to Reynolds, "Hook's bass carried the melody, Bernard Sumner's guitar left gaps rather than filling up the group's sound with dense riffage and Steve Morris' drums seemed to circle the rim of a crater." According to music critic Jon Savage, "Joy Division were not punk but they were directly inspired by its energy". In 1994 Sumner said the band's characteristic sound "came out naturally: I'm more rhythm and chords, and Hooky was melody. He used to play high lead bass because I liked my guitar to sound distorted, and the amplifier I had would only work when it was at full volume. When Hooky played low, he couldn't hear himself. Steve has his own style which is different to other drummers. To me, a drummer in the band is the clock, but Steve wouldn't be the clock, because he's passive: he would follow the rhythm of the band, which gave us our own edge." By "Closer", Curtis had adapted a low baritone voice, drawing comparisons to Jim Morrison of the Doors (one of Curtis's favourite bands).