This is Luka ' just be friend', i heard a little squeak :/ but if luka has another song it will be ahwasome, im sure!!! it's hard to breath in that kind of song. LOL i mean i will die by lack of oxygen bcs of that song anyway. i think, the song that they use is really risky 'just be friend' is almost impossible for human.

In demos, Hatsune Miku and the Append voicebanks for her were used not only seperately but blended together, this added many layers to the singing output that a single voicebank alone could not achieve, resulting in a much more human-like tone.tbh, i like Miku the most, then Rin, and the last is Luka. AIST （National Institute of Advanced Industrial Science and Technology) developed the system in where users can adjust the limits to where the original singer can normally sing to where the Vocaloid can better match the original singer's inflections and details to the point of sounding like the original singer. IM SO PROUD OF IT!!! THE TRIO VOCALOID SING OFF by Yamaha's vocaloid: VocaListener,using Miku's, Rin's, Luka's voice-bank.

Vocalistener vocaloid 4