My piano was recently tuned. The technician said the Upper Register was open and beautiful (typical of a Mason & Hamlin piano), the Middle Register was opening and the Lower Register was in process. I Vibrationally Tuned the piano to help open the Middle and Lower Register.

Our music group came a few days later for an afternoon of piano performance. They all commented on how well the piano responded to their playing. Middle and Lower Register sounded significantly different.