The company was purchased by Amazon in 2007 for an undisclosed amount. At the time of the acquisition, Brilliance was producing 12–15 new titles a month. It operates as an independent company within Amazon. In 1984, Brilliance Audio invented a technique for recording twice as much on the same cassette. The technique involved-, Brilliance was producing 12–15 new titles a month. It operates as an independent company within Amazon. In 1984, Brilliance Audio invented a technique for recording twice as much on the same cassette. The technique involved-