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). There have since been numerous installments, such as additional voice libraries dubbed ‘Append’, as well as an upgrade for the VOCALOID3 engine, which contained an English vocal release. On April 24th, 2015, it was announced that Miku would receive an update for the VOCALOID4 engine
On April 24th, 2015, Wat tweeted about a VOCALOID4 update for Hatsune Miku and that it would have repaired phonemes to sound like her V2 voicebank and other problems in her V3 will be fixed.
On August 31st, it was officially confirmed that Miku’s V4 update would be a V4X title and a demo was released showcasing a voicebank called “Hatsune Miku Original”. It was also revealed that Miku’s V4X would also contain 2 E.V.E.C. vocals: Soft and Power, though more E.V.E.C. vocals may be planned.
Note:This is only japanese voicebank. And this is pre-release BETA. FInal release by Crypton Future Media is planned on 2016.