I should probably clarify: Because I am a musician, I do not like having only one line of notes to read off of. This has had me wondering whether the coding in the human brain is similar. Do our brains work with only one line of code, as in one line of data, or is it more like harmony, where several notes come together on a staff so we get more than just a 1 or a 0?

No one really knows, they say they know bits and pieces but they dont even know that much in my opinion. The brain will always probably be a mystery. This is just my personal opinion. I have heard to many different stories about the brain and it changes every year. I just gave up on listening and trying to learn about it. It sucks to have to keep relearning and you still have all this misinformation in the back of you head.

I designed equipment for a neurobiologist for a while, and even the experts say how little they know.

While the inner workings of the brain are still a mystery, it is clear that processing in the brain is distributed, and is not centralized like the processing in a computer. In a computer, data goes through one and only one path. In the brain, there are so many paths that the interconnects between them all are far beyond our understanding. Even when we build tiny simulations of neurons, by the time we make the simulated network big enough that they start to mimic real brain tissues, the interconnects are so complex that we don't have a clue how to even analyze them.

That said, there are certain parts of the brain that are specialized, so that when one particular thing is though about, certain very specific parts of the brain activate and handle it. However, it is more like a harmony than a digital one and zero. When you receive a certain stimulus, multiple areas of the brain will fire off to handle it.