Takahito Eguchi on Sonic Lost World Original Soundtrack:

Cutscene - Master Zik’s Warm-up

This is the scene before the battle of Sonic and Master Zik. The flute sound plays loudly and strangely. It eerily brings out the dangerous “interval” in which the flute’s miraculous pitch feeling, which is not the temperament, lets the opponent’s guard down, and the both parties who have mysterious energies hidden at their backs. This unique timbre that seems distorted is something using “a certain gimmick” of Asahi-san’s original flute.