intro: guitar 1 (starts solo, without guitar 2) 
e-|-------------------------------------------------14-17----15-14-15--------- B-|-------------------------------------13-15----16-------------------15------ G-|-------------------------12-14----15--------------------------------------- 
D-|----------------------12--------------------------------------------------- 
A-|----------------12-13------------------------------------------------------ 
E-|--3-----1----15------------------------------------------------------------   

e-|-15-14-15-------15-14-15--------------------------------------------------- B-|----------16----------------15h16p15----------------------------------16-15 G-|-------------------------------------17-15-14-15-14----------14-15-17------ D-|----------------------------------------------------17-16-17--------------- 
A-|--------------------------------------------------------------------------- 
E-|---------------------------------------------------------------------------   

e-|--------------------------------------------------------------------------- 
B-|-15-------------------------15--------------------------------------------- G-|----17-15-17----17-15-14-15-------17----15----14--------------------------- D-|-------------------------------------------------17-16--------------------- 
A-|--------------------------------------------------------------------------- 
E-|---------------------------------------------------------------------------  

guitar 1 continued, duet with guitar 2 (notated below) 
e-|--------------------------------------------------------------------------- 
B-|-------------------------15----16-15--------------------------------------- G-|-------14----15----17----------------17-15-14-15-14-------14--------------- D-|-17-------------------------------------------------17-16----17------------ 
A-|--------------------------------------------------------------------------- 
E-|---------------------------------------------------------------------------   

e-|-------------------------------------14-15--------------------------------- 
B-|----------------------------15--------------------------------------------- 
G-|-14-------15-------17------------------------------------------------------ 
D-|--------------------------------------------------------------------------- 
A-|--------------------------------------------------------------------------- 
E-|--------------------------------------------------------------------------- 

(end intro)   guitar 2 (enters where indicated above) 
e-|--------------------------------------------------------------------------- 
B-|-----------------------------------4-----3-----------3--------3------------ 
G-|-----------------------------3--5--------------5--------5--------3--5------ 
D-|--------------------3--5--7------------------------------------------------ 
A-|-----------3--5--6--------------------------------------------------------- 
E-|--3--5--6------------------------------------------------------------------   

e-|--------------------------------------------------------------------------- 
B-|--------------------------------------------------------------------------- 
G-|--3------------------------------------------------------------------------ 
D-|-----7--5--3--5--7--5--3-----------------3--5------------------------------ A-|--------------------------6--5--3--5--6--------5--3------------------------ 
E-|-----------------------------------------------------6--5--6--5--3--------- 

(end intro)   first few arpeggios after Janis enters singing "Summertime ..."     Gm           Gm/F#       Gm7   
e-|-----------------------------------3--------------------------------------- 
B-|--------3-----------3-----------3-----3------------------------------------ 
G-|-----3-----------3-----------3-----------3--------------------------------- 
D-|--5-----------4-----------3------------------------------------------------ 
A-|--------------------------------------------------------------------------- 
E-|---------------------------------------------------------------------------       

Gdim                 Cm7 
e-|-----------3--------------------3------------------------------------------ 
B-|--------2-----2--------------1-----1--------------------------------------- 
G-|-----3-----------3--------3-----------3------------------------------------ 
D-|--2--------------------1--------------------------------------------------- 
A-|--------------------------------------------------------------------------- 
E-|---------------------------------------------------------------------------