#1
My e, G, and B string are making this weird dissonant sound, like if you were trying to tune a guitar by playing the same note on two strings and one is slightly out of tune, creating a noticeable dissonant tremolo effect, except I'm only playing one string. It becomes a lot more noticeable as you approach the 5-7th frets- what's the problem here? Do I need a truss rod adjustment? Is it a pickup issue?

Thanks for any help- the guitar is an Ibanez RG2EX1 (well, RG2EX2 according to the back of the headstock).
#2
This happens to my high E string on the 12th fret and above when the strings have been on for ages, and rusty/dirty (not that I don't clean them though). You may just have to change your strings if it's been a while, or clean them if you haven't for ages to see if it makes a difference.
#3
Huh, that actually makes a lot of sense. My E, A, and D strings are the three most recent to break, and I do the cheap college kid mindset of "you only need new strings if one breaks!" I'll try doing that soon and see if that helps, thanks!
#4
My epi les paul started doing this. Even when I put new strings on, my high E and G string do this weird dissonanc/buzzing/shaky sound all up the fretboard. I figured it had to do with a faulty bridge, maybe something to do with the saddles, or maybe the nut.

I never figured it out, and it's on consignment at a local guitar shop so I can get some money to buy a new guitar.