Thanks for your comments. The guitar is a 1945 or 46 Gibson LG-2...I did take it to a shop when I bought it 10 years ago and have the nut and bridge replaced with bone and the cross braces inside re-glued. The luthier suggested extra lights or lights...(I am a bit precious about the instrument...so I've stuck to extra lights) Tuning is standard but I'm going straight home and tune it to open D for kicks! So...I sometimes get buzzing...and I wonder if the Martin strings I'm using are appropriate. I'm not too savvy about strings and have been reading some posts about them that discussed buzzing and the posts mentioned that certain brands of strings can be problematic under certain circumstances.