buzzing or humming

I just bought a lightly used 06 nirvana double buck. It looks like it has never been played, a real gem. I noticed that when I touch my finger to the rear pick up poles while playing, it sounds ungrounded. At higher volumes the rear pick up hums pretty bad, but the front sounds great. The...

Hey, I recently got a (new) Corvette Standard 4, and have noticed some odd vibrations and buzzing coming when playing certain strings or frets (not fret buzz). I first noticed whilst playing my 8th to 10th frets on the G string but I have now noticed it noticeably when playing the open D and A...