The Soloist is indeed based on a true story. The filmmakers took real-life events and transformed them into a cinematic narrative while maintaining the core essence of the original events.
In 'the soloist real story', there are several key themes. First, the theme of redemption. The soloist has a chance to turn his life around through his music. Second, the theme of perseverance. He has to keep going in the face of his mental illness. And also, the theme of discovery. The journalist discovers the soloist's talent, which sets the whole story in motion.