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Why do instrument makers use seasoned wood for soundboards?

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Koto — stringed instrument A Japanese musician plucking the strings of a koto with the right hand to generate a pitch and pressing the strings with the left hand to alter the tone.

Instrument makers prioritize the use of seasoned wood for soundboards primarily because it is dry and stable, which is essential for achieving high-quality acoustic performance.1

The acoustic properties of wood—such as its pitch, resonance, and ability to amplify sound—are significantly influenced by its moisture content. High moisture levels in wood can reduce the velocity of sound and contribute to faster damping, which hinders the instrument's ability to produce a clear, vibrant tone.2

Furthermore, climate and humidity fluctuations pose a constant threat to the structural integrity of stringed instruments. Because wood naturally expands with humidity and contracts with dryness, using well-seasoned wood helps mitigate the risks of warping or cracking that can occur as the material reacts to environmental changes. By selecting wood that has been properly dried and aged, makers ensure that the soundboard remains stable and capable of producing the desired timbre and resonance.1