Vocaloid 2 is a singing voice synthesizer and the successor to the Vocaloid voice synthesizer application by Yamaha. Unlike the first engine, Vocaloid 2 based its output on vocal samples, rather than voice analysis. The synthesis engine and the user interface were completely revamped, with Japanese Vocaloids possessing a Japanese interface, as opposed to the previous version, which used English for both versions. It is noteworthy for introducing the popular character Hatsune Miku.
