Page reportedly used natural room ambience to enhance the reverb and recording texture on the record, demonstrating the innovations in sound recording he had learned during his session days. Up until the late 1960s, most music producers placed
microphones directly in front of the amplifiers and drums. For
Led Zeppelin, Page developed the idea of placing an additional microphone some distance from the amplifier (as far as twenty feet) and then recording the balance between the two. By adopting this "distance equals depth" technique, Page became one of the first producers to record a band's "ambient sound": the distance of a note's time-lag from one end of the room to the other.
[14][15]
Another notable feature of the album was the "leakage" on the recordings of Plant's vocals. In a 1998
Guitar World interview, Page stated that "Robert's voice was extremely powerful and, as a result, would get on some of the other tracks. But oddly, the leakage sounds intentional."
[14] On the track "
You Shook Me", Page used the "
backward echo" technique. It involves hearing the echo before the main sound (instead of after it), and is achieved by turning the tape over and recording the echo on a spare track, then turning the tape back over again to get the echo preceding the signal.
[14]