Autism music therapy case

My acquaintance's child is autistic, and the parents were struggling and worried a lot. When they couldn't find any other solutions, they happened to hear that music therapy could help with emotional issues, so they started without high expectations. At first, they regularly and frequently participated mainly in music classes, and after a few months, the child began to stabilize gradually. Then, after taking beginner-level instrument lessons, there was a noticeable improvement. While it can't completely change the child, it seems to be effective in bringing them within a manageable range.