Kagamine Len and Utatane Piko are vocaloids. 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. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.