Artist: Carcass
Song: Room 101
Album: Swansong

(Tune down 2.5 steps to B)

Intro (let ring)
|------------------|-------------------|  And the second time, play
|------------------|-------------------|  C5 D5 at the end of the riff
|----------0-------|-----------7-------|  (x35xxx, x57xxx)
|------------0-----|-2-----------5~~---|
|-2----------------|-0---2/3~~---------|
|-0---2/3~~--------|-------------------|
Here  ^^^ (and likewise  ^^^) may actually be a major third interval,
just let it ring (ie G and C chords)... this sounds close however.
 Riff A (let ring)---------------+
|----------------|----------------|----------------|-----------------|
|----------------|----------------|----------------|-----------------|
|----------------|----------------|----------------|-----------------|
|-----5----------|-----5----------|-----5----------|-----5-----------|
|---2---2~~----2-|---1---1~~----1-|---2---2~~----2-|---1---1~~---3/5-|
|-0---------0----|-3---------3----|-0---------0----|-3---------3-1/3-|
 P.M. main riff:
|----------------|----------------|---|---|---|---|
|----------------|----------------|---|---|---|---|
|----------------|----------------|---2---|---2---|
|-----5----------|-----5----------|---%%--|---%%--|
|---2---2~~----2-|---1---1~~----1-|---|---|---|---|
|-0---------0----|-3---------3----|---|---|---|---|

|----------------|------------------|  (not sure about this last bit)
|----------------|------------------|
|----------------|------------------|
|-----4----------|-----5------------|
|---5---5~~---5--|---2---2~~----3/5-|
|-2---------2----|-3---------33-1/3-|

Verse:
|-----------------|-----------------|-----------------|-------------|
|-----------------|-----------------|-----------------|-------------|
|---------2-------|-3---------------|---------2-------|-3--/4\3-----|
|-2-------2-------|-3-------5-------|-2-------2-------|-3--/4\3-5---|
|-2-------0-------|-1-------5-------|-2-------0-------|-1--/2\1-5---|
|-0-----0---------|-------0-3-------|-0-----0---------|---------3---|

|-----------------|-------------------|  Then Riff A, etc.
|-----------------|-------------------|
|---------2-------|-3-----------------|
|-2-------2-------|-3-------5------3--|
|-2-------0-------|-1-------5------3--|
|-0-----0---------|-------0-3----0-1--|
Interlude and under solo:
|---------------|  and then the same pattern up a major second
|---------------|  (ie. shifted up two frets)
|---5-----5-----|
|--5------------|
|/7---6~~---5-3-|
|---------------|