UltraStar is a free excellent clone of the popular Singstar ps2 game and great karaoke software. This version allows the artificial intelligence to evaluate how good you are when you sing by analyzing your voice. Get your friends, plug microphones to your PC, run UltraStar and sing together. Computer evaluates how good you sing and helps you by showing if you should sing higher or lower. Visual effects and movies makes game more pleasant that a simple karaoke player. UltraStar lets you compete with your friends so each players gets his own score. You can use two displays at once and let 6 players sing at once.

Windows Me, Windows 98, Windows 95, Windows 2000, Windows Vista, Windows NT, Windows XP

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Download
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People claim (and I agree) that the Deluxe version is much more stable!


UltraStar Deluxe.
http://ultrastardx.sourceforge.net/

UltraStar Singstar - if trying this software and the latest version gives you
issues, then Try version 0.7.2, I reinstalled it and haven't got any problem
since. It doesn't crash, but it's a (LITTLE) bit slower compared to 0.8.0.. I
hope 0.8.x will be more stable soon.

All versions
http://sourceforge.net/projects/ultrastar/files/

Download:
http://download.cnet.com/UltraStar-Singstar-karaoke-software/3010-2170_4-10723086.html?tag=mncol
http://sourceforge.net/projects/ultrastar/

Home page:
www.ultrastargame.com/

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Free Songs
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This website has the BEST range of Ultrastar songs. You just need to register, and then on the left hand side, browse whichever song you are looking for!

http://usdb.animux.de/

Try this website, too. It has a decent selection!

http://ussongs.kostenlos-php.de/download.php?LANG=EN

Here's another.

www.ultrastarsongs.com/

MIDI files? Five free downloads on their site.
www.ultrastargame.com/index.php?option=com_jdownloads&Itemid=3&task=viewcategory&catid=2