Song: The Widow
Band: The Mars Volta
Instrument: Bass
Tuning: Standard (GDAE)
Verse 1

G----------------------------|-------------------5--4
D—7----9~---7----10-9------|-------5----7----------
A----------------------------|--7---------------------
E----------------------------|-------------------------

G----9~---\\7---\5—4-----|--------0----/5--4---
D--7-------------------------|--2----------------------
A----------------------------|--------------------------
E----------------------------|--------------------------

Pre-chorus 1

G-----------------------------
D—7---/9---10---12---14
A-----------------------------
E-----------------------------

Chorus 1

G-------------------------|----------------------------
D---------7-----------7---|--------2-------------------
A—5---5------5—5-5--  -3-|---0--0----0--0—2---------
E-------------------------|--------------------3b.-----


                                       
                              (         Variation 1      )
G----------------------|-------------------------------
D----------------------|---------------7----------
A--------7-----------7-|-----7--5--7-----2/5-4/7
E--0--0----0--0--0-----|--5---------------------------

Verse 2

G---------------7---9-|----9~------9\\7---5--4
D--7////9--10---------|--9-------9---9-------------
A---------------------|------------------------------
E---------------------|------------------------------
              (*)
G-------9~--2/5-4-----|------10---9--
D--7--7---------------|--------------9
A----------------------|--6/7------------
E----------------------|-------------------

(*) hold this note for a long time.

Pre-chorus  x 1
Pre-chorus fill( A--3-2)
Chorus 2 with variation 2:

Variation 2

G-------------------------------------------
D-----------/7--/7--5------7--5-----
A---/7--/7-------------7----------7--
E-5----------------------------------8

Bridge/ Guitar solo
G-----------------------------|--------------------------
D-----------------------------|--------------------------
A---------7------------7-----|-------2-----------------
E---5-----------5---------7-|--0--------0---73------

G-----------------------------|--------------------------
D---------------7-------------|--------------------------
A---------7------------7-----|--------2------------------
E---5---------------------7-|--0---------0---73--------

G-------------------|--------------2-------
D-----------7--7----|----------2------5/7--
A-------7-----------|------2---------------
E---5-------------7-|--0--------------------

Pre-chorus 3 x 1( exactly the same, except with high a
                               At the end)
Chorus 3 with variation 3 x1

Variation 3

G-------------------------------------
D--------5--/7--5--/7--5--7----5-----
A-----/7-----------------------------7
E--5----------------------------------

This probably won’t sound very good to play on it’s own, especially the first time, but listen to the song and you’re more likely to understand it. I 
think that a stand-up or at least a fretless is being used, making it hard to decipher what’s being played. 

please rate.