Marsyas.
A satyr whose prowess with the flute was legendary, Marsyas, according to some sources, was instructed by the Phrygian flute-player Olympus, who is also sometimes called his father. Marsyas is often credited with inventing the flute, although differing versions of the myth say that he picked up the instrument after Athena (Minerva) discarded it because playing it distorted her face. The satyr presumed to challenge the god of music, Apollo, to a competition. The god agreed, with the stipulation that the winner could punish the loser however he pleased. The contest was judged by the Muses, who granted the victory to Apollo. His choice of punishment was to flay the satyr alive. The fauns, satyrs, and nymphs cried so bitterly at Marsyas’s suffering that their tears formed a river that bears his name.
      A popular tale in both classical and postclassical representations, the story of Marsyas has often been confused or conflated with Apollo’s musical contest with Pan, which was judged by King Midas.

For Further Reading:
Drügh, Heinz J. 2011. "Marsyas" in Reception of Myth and Mythology, ed. by M. Moog-Grünewald, Brill's New Pauly Suppl. I.4 : = (online) DOI: https://doi.org/10.1163/2214-8647_bnps4_e725180


      
      See also Midas, Judgment.