Source : https://usdx.eu/
Download :
https://www.qnapclub.eu/fr/qpkg/729
About :
UltraStar Deluxe (USDX) is a free and open source karaoke game. It allows up to six players to sing along with music using microphones in order to score points, depending on the pitch of the voice and the rhythm of singing. UltraStar Deluxe is a fork of the original UltraStar (developed by corvus5). Many features have been added like party mode, theme support and support for more audio and video formats.
more info : https://github.com/UltraStar-Deluxe/USDX