OverviewArtist type specifies the most common role that participates in. It's common that artists participate in multiple roles sometimes. For example, an illustrator might occasionally produce music. Artist type describes the most common role, additional roles can be specified with tags. Be careful when changing artist's type when that artist already has songs/albums added. If you do this, generally you need to make sure that artist's roles are still correct, because changing the type changes the default role for all those existing entries.
Music producersArtists whose main role is to compose or arrange music. Includes both original music and derivatives such as covers and remixes. Also voice manipulation (Vocaloid/UTAU tuning) is included.
Animation producerArtist whose main role is to create animation, either 2D or 3D.
CircleAn entity that creates music and self-publishes it, usually selling at doujin events such as Comiket and The Voc@loid M@ster. Usually a group of people, but it's common that music producers have their own "private circle" where they alone are the sole permanent member, and they possibly work with other temporary members.
Generally there is no need to create a separate entry for a "private circle", if the circle has only one permanent member. In this case, generally the circle information can be included in the producer's entry.
Sometimes when artists sign up with a record label, they transition from self-publishing circles into more conventional bands. An example of this is the group Supercell, which started out as with self-publication, but no longer does that.
LabelA commercial company with the primary objective of selling and distributing albums and songs.
Other groupFor groups of people where neither Circle nor Label is appropriate.
This includes groups of people (bands) that publish songs through a record label.
VocaloidThe Vocaloid type is reserved only for the voicebanks based on the Vocaloid desktop software (regardless of version).
This includes only official voicebanks. Pitchbends/genderbents and other fan-made derivatives are to be categorized as other vocalists.
Other voice synthesizerFor voice synthesizers that aren't Vocaloid or UTAU. For example, CeVIO and ChipSpeech.
As with the Vocaloid and UTAU types, this includes only official voicebanks, not fan-made derivatives.
Other vocalistFor all other vocalists that are either unofficial or not synthesized. This includes mainly human vocalists.
The addition of fan-made derivatives such as pitchbends or genderbents is discouraged on VocaDB. However, when those are added, they should be categorized as other vocalists.