<a href="https://en.wikipedia.org/wiki/Utau" rel="nofollow">https://en.wikipedia.org/wiki/Utau</a> - "UTAU is a Japanese singing synthesizer application created by Ameya/Ayame (飴屋／菖蒲). This program is similar to the VOCALOID software, with the difference being it is shareware instead of under a third party licensing.[1] "