Silbermann showed Johann Sebastian Bach different of his early instruments in the 1730s, but Bach did not like it at that time, claiming that the less than notes were too soft to allow a full dynamic range. Although this earned him some animosity from Silbermann, the criticism was apparently heeded. Bach did approve of a later doodad he saw in 1747, and even served as an agent in selling Silbermann's pianos.
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With duplexes or aliquot scales, which was patented in 1872 by Theodore Steinway, the different components of string vibrations are controlled by tuning their secondary parts in octave relationships with the sounding lengths |
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| Coinciding systems developed by Blüthner (1872), as well as Taskin (1788), and Grand Piano Covers Collard (1821) used greater distinctly ringing undamped vibrations to modify tone. |
