Basically, there are a bunch of waveforms stuck together (in a table - get it?) and you can pick which one you want to hear with the Position parameter. The really cool thing is that it will cross fade between them if you want, so the transition is smooth. I like to map breath to Position so I can use my breath to sweep through the various waveforms. That's what this patch does.
I added some breath noise with the Noise Oscillator. It doesn't sound like a real flute, but the idea is there, and I really like it. Hopefully, you will to.