At the end of what I think is the third verse of “Rock and Roll” on Led Zeppelin IV there’s this weird noise that’s definitely part of Robert Plant’s vocal track. It’s after the line “Open your arms open your arms open your arms, baby let my love come running in”. I’m pretty sure Plant was just exclaiming something like “yeah!” but for some reason it comes out all garbled on the album, sort of like “glelp!” I listened to this record a bunch of times as a kid, and always been curious about this. Check it out at about 2:41:
I wonder if it just turned out that way somehow from going back and overdubbing at that spot, or what. Anyone have any ideas?