Yes, Apollo and Marsyas were both outstanding, and they started to argue who was the best and in the end they decided to compete, and with some nymphs and others as judges and a lot of audience. Apollo played his lyre and Marsias his flute. But it became impossible to judge, it was a draw, and then Apollo came up with the brilliant idea that they should turn their instrument upside down and give it a new try. Said and done, a lyre works as well upside down and it's a bit harder with a flute, so the poor satyr lost.