Main riff - sped up sample from Isaac Hayes' 'Walk on by' (has a bit of a tremelo effect):
E|-------------------------------------------------------------------------------------|
B|-------------------------------------------------------------------------------------|
G|--------------8--10--10b12b10--8--10--8--10--8--10--8--10--8--10b12------------------|
D|----------10-------------------------------------------------------------------------|
A|-------------------------------------------------------------------------------------|
E|-------------------------------------------------------------------------------------|

This chord is played at the beginning of each bar throughout the song. It is in time with the above riff:
E|-------------------------------------------------------------------------------------|
B|-------8-------------------------------------8---------------------------------------|
G|-------8-------------------------------------8---------------------------------------|
D|-------8-------------------------------------8---------------------------------------|
A|-------------------------------------------------------------------------------------|
E|-------------------------------------------------------------------------------------|

Second 'riff' - strings (this sounds better with a guitar slide as you get a continuous change of pitch like
it is in the song):
E|-------------------------18\15---------------------------------18\15-----------------|
B|--------------------------------16/19---------------------------------16/19----------|
G|-------------------------------------------------------------------------------------|
D|-------------------------------------------------------------------------------------|
A|-------------------------------------------------------------------------------------|
E|-------------------------------------------------------------------------------------|

E|-------------------------18\15---------------------------------18\15-----------------|
B|--------------------------------16/19---------------------------------16/19----------|
G|-------------------------------------------------------------------------------------|
D|-------------------------------------------------------------------------------------|
A|-------------------------------------------------------------------------------------|
E|-------------------------------------------------------------------------------------|

E|-------11----11--11\-------------------------------------------18\15-----------------|
B|-------11----11--11\--------------------------------------------------16/19----------|
G|-------------------------------------------------------------------------------------|
D|-------------------------------------------------------------------------------------|
A|-------------------------------------------------------------------------------------|
E|-------------------------------------------------------------------------------------|

E|-------11----11--11\-------------------------------------------18\15-----------------|
B|-------11----11--11\--------------------------------------------------16/19----------|
G|-------------------------------------------------------------------------------------|
D|-------------------------------------------------------------------------------------|
A|-------------------------------------------------------------------------------------|
E|-------------------------------------------------------------------------------------|

************************************

| b  Bend
| \  Slide down
| /  Slide up