London: Previously-unheard music by the late English guitarist and singer-songwriter George Harrison is set to be released. The Beatles legend left behind a lot of unfinished material before his death aged 58 in 2001. His widow Olivia and their 37-year-old musician son Dhani are keen to get the tracks completed and released for his fans to hear, reports billboard.com. "There are a lot of songs that are unfinished. I think there's a project there. I just need time to get to it," Olivia said. It won't be the first time Dhani has assisted with his father's music. As an accomplished musician himself, he helped to record George's final album "Brainwashed", which was released posthumously in 2002.