Vocaloid2 Character Vocal Series 01: Hatsune Miku The Character Vocal Series is the first step to generate a realistic singing voice by simply typing the lyrics and melody. Vocaloid (Vocal+Android) is the speech synthesis software that was researched and developed by the Yamaha Corporation Center. Hatsune Miku, was built up on the basis of the character voices and cute pop by voice actress Saki Fujita