This is Journey's neck being cut to accept the soundboard. This is done on a sled that rides the slot on the table saw. A great and safe way to use the power of the table saw in delicate ways. this process hogs out the groove at just the thickness of the soundboard.
Here is the result. Now it needs a little more work with a chisel.
And here we go, with that great old English chisel I smooth out the flat. carve out the rest of the groove and we are ready to attach the top. Or almost.