Here’s the bass part I made up for Windows and Walls. This song is on Between The Lines, and it’s just Som Warnder playing piano.

Track 3:
Album - Between The Lines.
Bassist - Me! (no bass originally on song).

G|---------------------|
D|---------------------|
A|--------------4~-----|
E|-----2~--------------| @ 0.10 seconds 2x

G|-------------------------------------------|
D|-----1---1----------/4--21-----------------|
A|-2~----2---2-2~--2--------1~---/4~--4\\2~---|
E|-------------------------------------------|

G|-----------------------------------------------|
D|-------------------4~--------2h4---------------|
A|--------------4~-----4~----------4~-----2~-----|
E|-----2~------------------2~--------------------|

G|--------------------------------------------3-----------|
D|------2~--------2~----4\\1~---/4~---\\2~-------3-----4~---|
A|-----4---------4------------------------1~----1~-----4~-|
E|-2~--------2~-------------------------------------------|

G|--------------------------------------|
D|-----------------------------2h4------|
A|---------------4~---------------4~----|
E|-----2~-----------------2~------------|

G|--------------------------------------------3---3-----------------
D|------2~--------2~----4\\1~---/4~---\\2~-------3---3~-1~---/4442221-
A|-----4---------4------------------------1~----1~-----------------2
E|-2~--------2~-----------------------------------------------------

---3----3-----------------------------------|
----3----3----------------------------------|
1~---1~---1-------0h2-0~-----------0h2h4-0~-|
------------4~------------2~--4~------------|

G|-----------------------------------------------------3-----3~-----
D|-0~----------3p1~---4~------------------0~----4---4~--31~--1~-----
A|------2h4~-----------------------------------2-4~-----------------
E|-------------------------4~--2~---1~--------------------------4~--

------------------------------------------|
--------------0~--2-4------4~---3p1~------|
-----------24--------424------------------|
-2~-4~--1~-----------------------------4~-|

G|-------------------|
D|-------------------|
A|------------4~-----|
E|----2~-------------| 2x |-2~-|