In 2014, veteran Halo and Destiny composer Marty O'Donnell was fired by Bungie and ordered to return assets relating to his work on Destiny, including Music of the Spheres, the «musical prequel» he created with Paul McCartney. (O'Donnell was also told to give up his shares in Bungie, which he won back in a court case in 2015.)
Though legally prohibited from sharing or even performing music from Destiny and Music of the Spheres, O'Donnell uploaded musical sketches and variations to YouTube and
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