Lumber starts out as a tree, usually a big tree if it is harvested for woodworking or instrument making.
The sawmill will yield boards from the log of reasonable and workable size.
Once the wood has been dried the craftsperson will resaw the wood to the dimensions needed for the work at hand.
These days this is most often done with a bandsaw. A standard 14″ bandsaw can resaw most anything an instrument maker needs.
Setting up the bandsaw and fence is critical to the process but once everything is tweaked and set up properly I find resawing to be a relaxing process. I try not to get too relaxed as bandsaws are also used by butchers to cut meat…..
The one drawback of resawing with a bandsaw is the noise; it can get loud at times.
For large pieces of wood usually two people will operate the saw. This method of resawing is still in use today around the world.