Scale Design Aural Proofs
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These pages will demonstrate that piano scales with inharmonicity plots (hockey stick) similar to the left column will not have 4:2 and 6:3 octave tests that agree with each other while tuning from the plain wire section into the wound bass section. However, scales with inharmonicity plots similar to the right column will have 4:2 and 6:3 octave tests that closely agree.  


The above two graphs are before (left) and after (right) scales of a Chickering 4' 10" grand. You will hear the difference in the following pages.  

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The above two graphs are before (left) and after (right) scales of a popular Japanese Manufacturer. The left scale is the "Economy Model" circa 2000 to 2004. In the Fall of 2004 the new model was introduced which corrected the scale anomalies of the previous model..  