Template:Kaito V1 voicebank

Both Kaito and Meiko form the Vocaloid1 "series", following a different design intention to the series of Vocaloids that followed them by Crypton Future Media. Kaito is the male, designed to be the counterpart to Meiko within their series. Both Vocaloids are designed to be professional vocals for professional musicians. Since Fuuga Naoto's professional music style lay more in the Jazz area, Kaito's vocals lean towards this particular style of music because of it. However, before this was mentioned Kaito was already being used for many other genres such as R&B and pop. The style that he is best used for was considered pop ballads. Also, because Fuuga Naoto was a professional musician and vocal actor, Kaito's results were of a high quality. His overall vocals are of a slightly higher quality than Meiko's.

Kaito's vocal engine has been updated several times. He can utilize two kind of Vocaloid editors, VOCALOID 1.0 and VOCALOID 1.1, and they have different functions and features. There are many differences between ver 1.0 and 1.1, and they sound different even if they are edited in the same way. (Comparison of ver 1.0 and ver 1.1 without further editing Nico broadcast, Nicozon broadcast). The main differences are Singing Style and Portamento Timing.

To use his 1.0 version, users who are NOT using the 1.1.2 version need the patch Vocaloid Ver1.1.2 update file for Kaito distributed on Crypton’s official page first before they use VOCALOID 1.0 editor. Without patching, a critical error will occur. Like Meiko, Kaito did not have a Japanese interface and instead had the standard English Vocaloid menu so this made it difficult for Japanese users to work with the menus.

Kaito's vocals does have some variation in tone between higher and lower octaves, as in lower he is softer and more gentle sounding than higher octaves. Due to a lack of clarity, he is hard to use, although is relativly easier to use then Meiko.