We should talk - I'm building a new DAW with this in mind :)
But the MCP server isn’t the interesting part. It’s the round trip of composition and mixing. “Set up a calypso beat and baseline; add distortion to the bass; set up filters to protect the kick from the bass”
That's a very personal thing. A lot of musicians are extremely, extremely resistant to using LLMs to assist with composition. Obviously, too, some are not.
Note that "assist with composition" covers a lot of ground. There's Suno, and there's "let's experiment with chords changes to get from F Phrygian to C major"