If you care, here is a transcription for Led Zeppelin's Ramble On
(Note: I am doing this without my bass so there may be a couple mistakes; 
Listen to the recording for the timing.
G       7/11 11/9   | 	7/13 13/11 11/9     | 	 6 9 6      :|
D   9 7           11|  			11 9| 7 9 	9   :|
A 7 		    | 7			    |		    :|
E		    |			    |		    :|
^this is the verse.  Watch for variations, as Jones sometimes omits the D 
flat at the end of the 1st phrase
G		     |	                 |
D		     |			 | 
A	    6 77 76  | 		6 77 76  |
E 0 2 4 5 7 	   7 |0 2 4 5 7 	7|
^this is the pre-chorus - be careful, the timing is tricky
G
D     9			 14    12      12    13 14	
A 7 7   7	12 12 12    12 	 12 12    12 
E	  0 2 4 
^this takes some practice to get right
unfortunately, on the bridge it is hard to hear the bass, but the 
progression is |A|A/E|A/G|A|A/E|A then back to the verse
with hammer ons, something like
D 6h7 6h7 
A	   5h7 5h7
and then repeating.  Sorry if there are any mistakes :-)