Using a pentatonic scale for improvization (soloing)
I am learning to play music on a three string cigar box guitar tuned to an open E (1 5 1). I typically play based on the 12 bar blues, I IV, V, (E, A, B in my case). I have read the article on 12 bar blues and am trying to understand the guidance regarding improvization:
"Stage one is the most basic way to improvise over a blues progression; playing a straight minor pentatonic scale over the whole thing. As long as you stick with that scale pretty much everything should sound good, "
At a base level, I understand this, and I even understand why it works, almost. If I am playing in the Key of E, which minor pentatonic scale am I using to improvise? Is it the relative minor from the circle of fifths? For E this would be C#m. This doesn't seem right to me as I can see no connection between the C#m pentatonic scale and the key of E.
I'm sure it is a simple concept I am missing here or maybe I have over analysed everything and I'm completely lost. My goal is to figure out what scale to use to improvise with my usual E,A,B progression. From there I hope to be able to figure it out for other keys on my own.
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