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Yass Karaoke Editor

Yass is a graphical editor for finetuning Ultrastar karaoke songs. You can drag & drop notes, spread syllables, and find errors. Further you can filter your song library, mass-tag or batch-correct them, or search for lyrics.

I develop it since 2009, just for leisure. Don't expect anything.

Contact me if you want to contribute to this project.

Have fun! 🎵 Saruta


Executables can be found at


Basic setup is described in the Wiki:

Yass uses

  • Java Look & Feel Graphics Repository
  • JavaZoom JLayer / MP3SP / VorbisSPI and Tritonus Sequencer
  • iText
  • Jazzy Spell Checker
  • JInput
  • TeX Hyphenator
  • VFFMpeg Objects (fobs)
  • Java Media Framework (JMF)
  • Robert Eckstein's Wizard code
  • juniversalchardet

Licenses are stated in the application's help section.

Speed measure 'Inverse Duration' based on Marcel Taeumel's approach (


Copyright (C) 2009-2023 Saruta

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see