So has anyone in the piano industry made a piano soundboard entirely from one solid piece (that is if they found a large enough tree)?
I know it's been done before where the entire piano rim is one solid piece of wood rather than laminated (I think Bosendorfer pianos are famous for this process).
Good job, gskmeva123. You are very close!
Here is the thing. An entire soundboard could never be made of one entire tree. This is because there is only a particular part of the wood that is used in making a soundbaord and part of the "recipe" is the way the pieces are cut. They are quarter sawn. This is more expensive than plain sawing, traditionally more wasteful, but results in a more stable piece of wood with a more favorable grain orientation.
Also, although a BÃ¶sendorfer is made with more soundboard quality spruce than any other piano in the world, it is not one solid piece of wood. That would also be impossible.
My 2 cents,