When I say muddy, I'm usually referring to a rythym tone that's not articulate and clear enough for me. Maybe I just took a solo and then I switched to the neck pickup and turned down the guitar's volume control to clear up the tone and get a nice tone for chords but the tone is a Little muddy...like it has to much bass or the mids are a little blurry or it lack highs. That's muddy to me.