Last night I noticed some dead notes on my bass, I have never heard this before last night. The notes are G string D(7), and D string the A(7) and the G(5). After sleeping on it I think it may have to do with the fact that I lowered the action as low as it would go last week. So now I'm thinking a small truss rod adjustment may be needed as a side note, last night I raised the action on the A string(and just the A) but the dead note was still there. OK this is weird, I just checked the bass to make sure I was giving all the info on the dead notes and they are gone. I do have slight fret buzz on the D and A stings around the 12th fret. I also have the windows open because the weather is nice, could it just be the neck reacting to the open windows?