On November 20th, 2014, VOCALOID4 was officially announced through a livestream and some companies appeared announcing their upcoming updated VOCALOIDs. VY1v4 was one of these upcoming VOCALOIDs for the new engine. Its voicebank was used to showcase the new features and capabilities of the VOCALOID4 engine. It was revealed that VY1v4 also contained four voicebanks: Normal, Power, Natural, and Soft. VOCALOID4 and VY1v4 became available on December 17th, 2014, making it the first vocal to be released for the engine. Shortly prior to VY1v4’s release, the YouTube demo uploads of iNSaNiTY and COSMONAUTS were set to private due to YAMAHA’s request. They were once again made public after VY1v4 released.