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How to Tune Pianos

The Hobby, Skill, and Career of Piano Tuning

By Mark Cerisano

Unison Problems Lesson 5

Mismatched Strings

Each string of a trichord needs to have the exact same inhamonicity. Inharmonicity is determined by string diameter. Sometimes the strings of a unison may have a different diameter. (Factory error. Technician replaced wrong string.)

Watch the video below to learn what can happen when unison strings have a different diameter and what to do about it.

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