#1
Hey, if a song has a chord progression of G D C for example, does it sound better to solo over that progression in just a g pentatonic or major scale, just soloing in the main key, or to have your solo switch keys with the progression, going from soloing in g for a bar to soloing in d for a bar to soloing in c for a bar and so on.
#2
Find the key that fits all of the chords (in this case G) then solo in G for the entire shebang

edit: So yes, the "main key" concept
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