What is "livetune"

Livetune (stylized as livetune) is a Japanese music group which formed in 2007 as a dōjin music circle signed to Toy's Factory. The band originally consisted of two members, Kz and Kajuki P, but Kajuki P left the group in March 2009. Livetune started out by making use of the Hatsune Miku singing synthesizer to produce vocals for songs submitted to the Nico Nico Douga video sharing website. The popularity of the songs led the group to release the independent album Re:package at Comiket 73 in December 2007. Livetune made its major debut with Victor Entertainment with the professional release of their Re:package album in August 2008, which was updated with more songs. Livetune began collaborating with other artists in 2009, and has since composed music for such artists as Kotoko, ClariS, Maon Kurosaki, and fellow dōjin musician Ryo of Supercell.