Hatsune Miku
Hatsune Miku was the first Vocaloid developed by Crypton Future Media after they handled the release of the Yamaha vocal Meiko and Kaito. The name of "Hatsune Miku" was conceived soon after the Vocaloid 2 announcements, when an English and Japanese vocal were developed for the character. The intended design was delayed and later used for Megurine Luka instead. Miku was intended to be the first of a series of Vocaloids called the ""Character Vocal Series"", which included Kagamine Rin/Len and Megurine Luka. Each had a particular concept and vocal direction.
Vocaloid 2
Crypton Future Media had produced vocals for this version of the software Renders of the beta vocals could be heard in various mediums. Meiko was used in the song on the album . Originally, the song used Meiko's original Vocaloid vocal. Luka's Append vocal was used on the album for the song "Hoshizora to Yuki no Butōkai (Zeal mix)". The promotional album "Vocalo Append" used a beta of Luka's "Soft" Append. Miku's English vocal in particular was low quality and was not released in the engine for this reason. The vocals were announced to have been dropped in favor of Vocaloid 3 productions on December 1, 2011. Songs using the beta versions also featured in "".