Format: String + Finger (e.g., D1 = D string, 1st finger)
E
= 1st string (highest)
A
= 2nd string
D
= 3rd string
G
= 4th string (lowest)
0 = Open string
1 = 1st finger
2 = 2nd finger
3 = 3rd finger
4 = 4th finger
L = Low (half-step back, e.g., AL2 = low 2nd finger on A)