So I picked up an American Standard Precision Bass recently since I've been obsessed with getting a thick sound in rock bands. For whatever reason it sounds okay on its own, but when I play with music it's like the best thing I've ever heard. Anyway... I bought it off the shelf, so have been hyper critical of anything wrong with it. It was set up recently and seems well done. As I've been messing around with harmonics I noticed a slight dissonance between the A and D strings. So, if I hit the harmonic on the 5th fret A string and then 7th fret D string, it sounds exact but then will ever so slowly pulse out. The bass is perfectly tuned (using seventhstring online tuner). So I start freaking out and then pull out my other bass (American Jazz), tune that puppy up. Same thing. Am I missing something? When checking the intonation otherwise (for example open and 12th frets), everything else checks out. Do I have a couple "off" basses? Thanks in advance.