My bass guitar suddenly started making a buzz sound when i play a Bb on the 6th fret of the E string, its never done this before and just started. what could be some problems that would cause this?
Is the neck bent? If it is then the truss rod will be the key to fixing this.
Are you getting the buzz on all of the notes on the 6th fret? If so, it could be a high or low fret. Even if you're not getting it on all of the notes on the 6th fret, it could still be a fret height problem. I would suggest bringing it to your local guitar shop.