Hello everyone. Have a new bass that has noticeable buzz playing an open A. I am quite sure it is the first fret. Could this be adjusted out with the truss rod or could the nut slot be slightly too deep? If so is there a quick fix. All the other strings are ok. Can I take the nut out and stick something underneath like a very thin piece of plastic (the nut is plastic I think)with superglue? I dont think this would have an adverse effect on the other stirngs and wouls seriously only have to be .5 mm or so. Any suggestions? Thanks.