Radiohead - Optimistic

Never any bass during the first two times a verse is sung.

Tuning:  Drop D

*RIFF #1 The bass comes in quietly at 1:07:
G----------------------------------------------|x2
D----------5-----------------------------------|
A--------------5---3h5-5-5-x-x-3h5-5-5--5-5--5-|
D--0---0---------------------------------------|

During the interim between the first refrain and second verse:
G---------------------------------|
D---------------------------------|
A-----5--3h5-5-5-----5--3h5-5-5---|
D--0--------------0---------------|Repeat until 2nd verse

Repeat Riff #1 during the second refrain. Then, at 2:32:
*RIFF #2
G--------------------------------------------|x4
D--------------------------------------------|
A--7h8-8-8--8h7-7--7--9h10-10-10--10h9-9--9/-|
D--------------------------------------------|

During the third semi-verse, just thumb the low D-string:
G--------------------------------------------|
D--------------------------------------------|
A--------------------------------------------|
D--0-0-----0-----0-0-----0-----0-0----0------|

3:58

Now, repeat Riff #1, then play Riff #2 with slight variation 
on the second repetition:
G--------------------------------------------------|
D--------------------------------------------------|
A--7h8-8-8--8h7-7--7--9h10-10-10--10-10--9/12-12/5-|
D--------------------------------------------------|

G--------------------------------------------------------|
D---------------------------------------------12h10------|
A--5h7/8--8--8-7--7-7---9h10--10--10--9--9\--------12h10-|
D--------------------------------------------------------|

4:20

The first part of the outro features improv on high D:
G--------------------------------------------------------|
D-0-0-12--0-10-----10h12--0--0-12--0-10-0-12-10----------|
A---------------12------------------------------12-------|
D--------------------------------------------------------|

G--------5h7-5-----------7-------------------------------|
D--------------7--5--------------------------------------|
A-1-1-1-------------5--5---5-----3h5--5--3---------------|
D----------------------------3h5-------------------------|

G--------------------------------------------------------|
D-0-0-12--0-10-----10h12--0--0-12--0-10-0-12-10----------|
A---------------12------------------------------12-------|
D--------------------------------------------------------|

G----------7-5-----------7------------------------7----7p5-------|
D--------------7--5----------------------------------------7-5---|
A-1-1-1--5----------5--5---5-----3h5--5--3---5--5----5---------5-|
D----------------------------3h5---------------------------------|
You can also hit the 7th fret and bend the 12th if you like.

4:52

The final part of the outro is light and jazzy, and goes:
G--------------------------------------------------------|
D-0--0h12-0h10---0h12--12p10-----------------------------|
A----------------------------12-(10)---------------------|
D--------------------------------------------------------|