有声读物: Piano Tuning: A Simple and Accurate Method for Amateurs

This is a primer for anyone wishing to learn how to tune and maintain their own piano or to become a piano tuner. Written in 1907, it was targeted at a definite need for additional piano maintenance professionals in those days when pianos were almost ubiquitous. In addition, there are several chapters dealing with the theory and application of temperaments which will be of interest to any serious student of music. Please note that Concert Pitch as used in the book equates to A-454, considerably higher than today's standard of A-440.- Summary by JHedrick