After losing his captcha, a tone deaf scientist must prove himself human in a music duel, or slave his life in an AI camp

The movie plot: it seems hazy and confusing.
In an AI driven world, a scientist is asked to compete in a music duel to prove himself being a human.
This does not seem clear. If your character is a scientist then he must end up justifying his prowess over technology. A scientist is always a known person in his workplace. Having trouble to prove himself as human is hardly any plot for your scientist character. Not only that you made your character tone-deaf. Double drop.
Why scientist, why not a worker. E.g., a depressed, exiled? worker who has been working in the AI camp, without any identity, is asked to prove himself a human. This can make sense. Now the plot? – of proving himself in a music duel is hard to pull. But this can be good if the particular AI section was a musical manufacturing unit and the said genre was drama/comedy.

Based on your comments: Your plot is based upon an assumption that the AI cannot compose music like humans.? What if you create a conflict where the character is not being taken seriously of him being a human. While your character roams around the labor camp, for week, trying to get attention or someone listen to his plea, he hears a musical competition which can attract attention of higher officials and get him out of there. So he decides to participate in the concert. He needs to train himself for music, during which he gets fascinated by the amount of intelligence a music requires. He enjoys it so much that he decides to actually compete in the music duel. He makes it his obsession that only if his music is loved, he shall contact the higher officials or else he may not, and remain among the laborers.

The scientist, the captcha and AI campus are a lot confusing to fit in a musical plot. Good luck for going forward with this.