Vocaloids Kagamine Rin and Hatsune Miku. VOCALOID is a Singing Synthesizer technology and application software developed by the Yamaha Corporation that enables users to synthesize singing by just typing in lyrics and melody. Yamaha announced its development in 2003 and in January 2004 the first application software product was launched. It was not released as a Yamaha product, but a software package of Vocaloid Singer Libraries developed by third party licensees which included Yamaha’s Vocaloid software.