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Speaking as a guitar player I should mention that the voicing of the chords can make what you do sound authentic or inauthentic. The strings of the guitar are tuned in fourths and thirds, so real guitar chords are built around the way these intervals fall across the strings. "Here Comes The Sun" is full of lines built from these intervals, as are many other songs.
Simple changes to the way you finger and invert chords will sound more or less real depending on how close your voicing aproximate the intervals on the guitar. Standard close voicings like you see in piano chord books are right out. Ask a guitar playing friend to show you a couple folk type chords and try to reproduce the inversions on K'bd. You can do a good job with just 3-note chords if you get the hang of the voicing.
Douglas Wolfe
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