This movie is a take on what does music mean. Monsieur de Sainte Colombe (1640-1700), in a wonderfully sensitive performance by Jean-Pierre Marielle, was devastated by the loss of his wife. This inspired him to compose what might have been the first real "soul" music (from the gut) to see the wider audience (i.e. Surviving to this day). His most famous student was Marin Marain (1656-1728), played by Gerard Depardieu (both pere and fils). He was accepted as student but told perhaps a bit too dismissively that although he played well he was most fit for public squares and perhaps the Court, the latter held in deep contempt by Sainte-Colombe.
Subsequently we indeed do see Marain bouncing a pole on the the Royal floor (apparently they way they conducted back then) leading a group of Court musicians in what was simply the music of the age, i.e., pomp and circumstance, but within the context of the story hopelessly dull and inartistic. Can the story mean simply that music should have feeling? Or is there more? A prevailing cliche is when there are no longer words to describe, that's where music starts. Is that good enough? What would Monseiur de Sainte Colombe say about that?
There is a subplot involving love interest that informs the theme. As indicated above, the young Marain is played by Gerard's son with the latter taking over as the adult. Wow, how often does that happen? Depardieu fils is impressive. There are fairly long music passages that the uninitiated might find a tough go but it is a well-made film, meticulously so. Well worth it for those who hang around.