I put a new set of D'Addario EXP74CM on my Gibson Fern and for the life of me, I cannot get the g strings to ever sound in tune with each other. I can always hear them as two individual strings instead of as one bigger sounding string. Very odd. I've never had that problem before. I can't think what else besides the strings could cause it. At the cost of them, I hate to toss them out and put on yet another set.
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