Pinging B string
A (more than slight) pinging sound coming from the B string on my Martin DM.
I can hear it open or fretted and it seems to be coming from the saddle end, which I swapped to a bone one instead of tusq trying to eliminate the problem with no success.
It's been regularly set up by the local guitar shop and he cant seem to find the reason why as everything else appears to be in good order.
I've tried different strings with no effect, currently strung with Martin mediums, 13,17 etc. I've tried graphite at both the nut and saddle, tweaked the truss rod both ways and cant think of anything else to try.
Any ideas? Thanks.
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