Hatsune Miku (初音ミク), codenamed CV01, was the first Japanese VOCALOID to be both developed and distributed by Crypton Future Media, Inc.. She was initially released in August 2007 for the VOCALOID2 engine and was the first member of the Character Vocal Series. She was the seventh VOCALOID overall, as well as the second VOCALOID2 vocal released to be released for the engine. Her voice is provided by the Japanese voice actress Saki Fujita (藤田咲, Fujita Saki).[1][2]

Designed to be a cute, high pitched and young female Japanese singer, the vocal is of a non-professional vocalist and represents a voice acted result. It has strong attack and is known for its fairly high adaptability and morphing ability. Due to its high usages among Japanese producers, the vocal was regarded as both "The VOCALOID" voicebank, as well as the "standard" vocal among VOCALOID usage, the vocal itself was meant to replace KAITO and MEIKO from VOCALOID. Miku was created to have stand out vocal traits compared to MEIKO. This was also the first vocal for VOCALOID2 that was designed for VOCALOID2 itself.