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While a crack doesn't always ruin the sound, a "true" structural failure requires professional "shimming," where a technician glues a thin wedge of matching spruce into the crack to restore tension. The Bridge Crack true piano crack
The soundboard is a large, thin piece of spruce that vibrates to amplify the strings. Because it is made of organic wood, it expands and contracts with humidity. Offers world-class, professionally recorded pianos for free
Often includes free "factory selection" pianos that sound professional. Conclusion true piano crack