Hatsune Miku (初音ミク) is a singing synthesizer application with a female persona, developed by Crypton Future Media. It uses Yamaha Corporation's Vocaloid 2 synthesizing technology. The name of the character comes from a fusion of the Japanese for first (初 hatsu), sound (音 ne) and future (Miku (ミク) sounds like a nanori reading of future, 未来, normally read as "mirai"), referring to her position as the first of Crypton's "Character Vocal Series". She was the second Vocaloid to be sold using the Vocaloid 2 engine and the first Japanese Vocaloid to use the Japanese version of the Vocaloid 2 engine. Her voice is sampled from Japanese voice actress, Saki Fujita. Hatsune Miku has performed onstage as a projection.
After acquiring the Vocaloid 2 speech synthesis engine from Yamaha, Crypton Future Media began to develop their third Vocaloid. Miku Hatsune's voice was created by taking vocal samples from the voice actress Saki Fujita at a controlled pitch and tone. These different samples all contained a single Japanese phonic which when strung together would create full words and eventually phrases. The pitch of the samples was to be altered by the synthesizer engine itself and was constructed into a keyboard style instrument within the Vocaloid 2 program.
Crypton released the first of their "Character Vocal Series", Hatsune Miku, on August 31, 2007. Crypton had the idea to release Miku as "An android diva in the near-future world where songs are lost."