The Observer Tab

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The Flaming Lips
The Observer (tab)
The Soft Bulletin

This song only has two sections: the riff and the bridge.
The riff is really straightforward, but the bridge is more based on improvisation.

Main Riff
e|---7-----8-5--|---7-----8-5--|---7-----8-5--|-7-----5-----4--------------|
B|-5-----5------|-5-----5------|-5-----5------|---8-----6-----5---(3-3/5)--|
G|--------------|--------------|--------------|----------------------------|
D|--------------|--------------|--------------|----------------------------|
A|--------------|--------------|--------------|----------------------------|
E|--------------|--------------|--------------|----------------------------|
 (The little bit in parentheses at the end is optional)

Bridge
e|---------|
B|-10-8----|
G|------9--| (Improvise around these three notes)
D|---------|
A|---------|
E|---------|

The guitar in the bridge is not prominent in the mix and does not have a definitive
structure. He basically improvises using these three notes for the entire bridge.
Listen closely to the bridge and you'll understand what I mean. 

Here is the song layout:

0:10-1:44 - Main Riff x2
1:45-2:24 - Bridge
2:24-end  - Main Riff x2