Marius Larce is a confident and self assured man who for years ran a school of musicology. His honor, however, it not above reproach for there are allegations that he has stolen from his students including Calliope from whom he commissioned a collection of songs known as the "Songs of the First Cycle." These songs were meant to emphasize the heroic nature of the The First Men, how they were created by the gods and favored amongst the other races, but The Maestro poisoned the music with cynicism and uncomfortable syncope.
Yes, he took her work, pretended it is his own and performs it along with his other student Antiope Shadowsong. What is worse, he bad mouths Calliope saying her works are derivative, base and off not consequence. Because the Songs of the First Cycle are so well received and thought to be his own, he is widely believed.