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![PDF] Tone production on the piano: the research of Otto Rudolph Ortmann | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/1f00283ecdd334ded2c270c51694a0d830e1c1de/105-Figure4-1.png "PDF] Tone production on the piano: the research of Otto Rudolph Ortmann | Semantic Scholar")
PDF] Tone production on the piano: the research of Otto Rudolph Ortmann | Semantic Scholar
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