The sound of the album is strong, with those guitar riffs that characterize them. Many songs were written by them themselves, but they also included versions of blues songs by artists like Willie Dixon and Howlin’ Wolf. One of those versions, Whole Lotta Love, was released as a single and became quite popular, reaching the top ten in several countries.
The recording was a bit chaotic, because it was done between tours. Sometimes they had only two hours free between one concert and another, and they used that time to get into a studio. The bassist, John Paul Jones, said that in those improvisations, especially in Dazed and Confused, some solos came out that turned into fast and furious ones.
The studios where they recorded weren't all modern. One in Vancouver, for example, was more like a shack, without headphones or much else. But despite that, the result turned out well. The production was done by Jimmy Page, and at that time he was already working with Eddie Kramer, who had done important work with Jimi Hendrix. The combination between the two gave a sound that still sounds fresh today.