Just for fun.

Here's something else to think about that may cause someone to shriek and stamp on his hat:

Let us say you're playing a "power chord." Open fifth, say G and D. Even doublings of those two notes; every G and D on the fingerboard that your fingers can reach.

Hell, lets go even further. You've re-tuned your guitar so that when you play all six strings simultaneously, between open strings and fretted notes, there are only Gs and Ds. Okay? Got the picture?

A POWER chord!!

Now—suppose, at that point in the song, you happen to be singing—a B.

Between the voice and the guitar, that open fifth power chord is now a G major.   Or—if the sung note is a Bb, it's a G minor.

Let me put it this way:   if all of the instruments in an entire symphony orchestra are playing full blast, with some of the instruments playing Gs and the others playing Ds, one lousy piccolo playing either a B or Bb identifies that chord as either G major or G minor.

As Walter Cronkite used to say at the end of his newscasts, "And that's the way it is."

Don Firth