This patch actually surprised me. I love flute-like sounds and somehow I stumbled across this sound. This sound uses the Wavetable Oscillator in Thor to add a harmonic to the tone with Breath. It sounds like overblowing on a flute. The Wavetable Oscillator is really cool, you can find out more than you ever want to know about it at Propellerhead's web site here and here.
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.