>...IF I have set them properly, what other factors could be in play >here? It must be the machine- it can't possibly be me! :) My take on what you are experiencing is this: Allow for the possibility that the strings aren't giving a pure sound. I have noticed the same type variance when measuring with the RCT program on occasion. The readings will only be as accurate as the source. Keith McGavern Registered Piano Technician Oklahoma Chapter 731 Piano Technicians Guild USA
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