Answer: I'd say they're an acoustician
Explanation:
In a standard classical concerto there are 3 movements. Usually it's in the order of fast, slow, faster.
Well you pick a theme, for example never giving up. (theme is up to you) and then you pick a song that goes with the theme, a good example for this theme is songs like Titanium by Sia etc..
Insight.Chan insight is in the stage of the festive process