Though they have frequently been used on electric guitar (think Keith Richards and Jimmy Page), open tunings are particularly effective on acoustic guitar (look to Joni Mitchell, Nick Drake, Nick ...

So, in the key of A (A B C# D E F# G#), the chords are A, D and E. Either jam on these three major chords or use 6ths, 9ths and dominant 7ths for an authentic blues vibe. We’ve used open-string root ...