copy of those CD-DA tracks. Before the introduction and subsequent popularization of iTunes and the iPod, such discs were popular for sharing music on compact disc without requiring the recipient to extract and encode the CD-DA themselves — a technical and perhaps time-consuming process on older computing hardware. However, with the advent of faster computing hardware and vastly simplified automated extraction and encoding tools (e.g. iTunes, Rhythmbox, etc.) and the lack of an automated hybrid feature in that very same software, popularity of such hybrid CD has subsequently declined. However, such hybrid discs do remain in a commercial setting as a digital rights management enforcement technique, where encrypted compressed copies of the digital audio are provided with proprietary software for listening in a computer disc drive, while the CD-DA is included for playback in stand-alone CD players. Hybrid Blu-rays In recent years, some Blu-rays have been released as Hybrid discs, demonstrating its compatibility with the PlayStation 3 console, which uses BD as its primary disc format. These discs generally include a movie or feature that can be played on any Blu-ray Disc player and playable content which is accessible when run on a PlayStation 3 console. Examples include Tekken Hybrid, Macross Frontier: Itsuwari no Utahime and Lagrange: The Flower of Rin-ne -Kamogawa Days-. See also Universal binary References Audio storage Compact disc Consumer electronics Disk file systems Rotating disc computer storage media Video storage