Posted this on another board, but figured it made since to also post here since there are a lot of Zep fiends on this board. Any help appreciated! I realize this song is basically a slow blues in C minor, but am having a hard time figuring out what is going on from a theory/chord sequence perspective during the two chord descending lick Page plays at the end of the turnarounds. I pretty much know enough theory to get myself in trouble, hence the request for help interpreting this. The part I'm talking about first occurs at 1:06 in the song and chord shape for the first chord could be (going by chord shape, not key context) a few things; a D7 with 5th in the bass, A minor 6, or A diminished. I guess it could also be Ab7 with A in the bass (not sure this would be any different than A dim). The second chord, I don't know... I hear it as some sort of walk-down to the 5 chord of G7 (or equivalent diminished dominant sub) Can anyone shed any light on this? Also, what about the 6th diads played on the 5th and 3rd strings right before the turnaround? I interpret them as the 5th and Major 3rd of the 6 and 5 chords, but not sure about the last one on the 6th and 4th string that directly precedes the turnaround lick in the original question. Hope this is understandable. Besides the solo, this is one of the signature licks in the song.