His work showed the real potential of both the Commodore 64's sound hardware and the ability of good music to improve the gaming experience.In the late seventies, before scoring games, he was a professional studio musician. He decided to teach himself BASIC and machine code for the Commodore 64. His first game soundtrack was for Thing on a Spring, a platform game for Gremlin Graphics, Hubbard created a theme that mixed violins, electric guitars, and amusing basslines. Hubbard went on to write or convert themes for many games on the C64 before moving on after the C64 peroid to composing for PC -games and Sega Mega Drive.