Peace of Mind by Boston - not the same old I-IV-V

I'm not sure what you're asking.

It's in the key of E. C#m is the vi chord in E, probably the most common after the I (E), IV (A) and V (B). F#m (ii) and G#m (iii) are the final two, not Ab and Gb.

C#m is the "relative minor" scale of E. It's very common to have intros and choruses and such in closely related keys such as the relative minor.

The song uses neither the pentatonic scales nor the blues scale, but the most basic one of all, the major scale.

E major (C# natural minor) has the notes

E_F#_G#A_B_C#_D#E (Note that there is only 1 of each note, therefore no Ab or Gb)

Position change?

If the notes truly are :

G#-F#-E-C#-C#, (3-2-1-6-6)
E-D#-E-F#-E (1-7-1-2-1)
F#-E-C#-C# (2-1-6-6)

Then they seem easiest to play something like this:

e|--------------|-------------|-----------|
B|--------------|-------------|-----------|
G|-1------------|-------------|-----------|
D|---4--2-------|-2-1--2-4--2-|-4--2------|
A|--------4--4--|-------------|------4--4-|
E|--------------|-------------|-----------|
G# F# E C# C# E D# E F# E F# E C# C#


I don't know the song nor have it, so you'll have to use your judgement for note lengths and rhythm.

It might also be played in a higher octave.

It's been some time since I sussed out a lead on my own.
After posting I started using a program to slow it down, which makes it a lot easier.

I've been playing the riff on one string (A), which sounds better.
The slides are quite hard on the index finger though.

Thanks!!

Ron