Syrinx

Syrinx was a nymph and huntress from Arcadia. Like other nymphs who enjoyed hunting, Syrinx was a companion of Diana (Artemis), and like her goddess, she wished to remain a virgin.

Her wish could not be kept, especially when the shepherd-god Pan lusted after her. Syrinx fled from Pan, hoping to escape. When she reached the Ladon River that flowed through Arcadia, she couldn't cross and was trapped. Syrinx prayed to the river-god to save her from Pan.

Ladon answered her prayer by transforming her into marsh reeds. Pan arrived only to find that Syrinx had escaped. Pan created a wind-instrument - reed-pipes, called syrinx - by breaking a half-dozen reeds of various lengths, and binding the reeds together by using wax.

Pan used this syrinx to challenge Apollo in a music contest. Two judges awarded Apollo, but Midas thought Pan's instrument sounded better. Apollo punished Midas, but I guess you should read about Midas in order to find out about his punishment in Wrath of Heaven.