UTAU

What works

Almost entirely useable without major issues or lost functionality. Minor visual annoyances

• Sound output is broken by default (after implementing workaround works as it)(1)
• WAV file rendering produces valid results (if a workaround is implemented)(1)
• Graphical user interface displays properly (if the steps below are taken)
  - Prior to installation the user needs to install ckjfonts,
  - The installer has to be ran with LANG=ja-JP.utf8,
  - After installation, the software has to be ran with LANG=ja-JP.utf8,
• Japanese character encoding and uta—the default voice, if installed and ran correctly
• OTO configuration,
• Default plugins,
• tested 3rd party plugins*, 
• tested resamplers**,
• default wavtool, wavtool64, 

*Tested 3rd party plugins: iroiro2, ????????(frq editor) - editing of mrq, frq,
**Tested resamplers: resampler (default), moresampler 0.8.4, doppeltler009, f2resamp005, phaavoco001, TIPS, tn_fnds009

What does not

1. Playback timing is broken by default.
2. Mojibake if installed and/or running without  LANG=ja-JP.utf8, text looks wrong and doesn't display japanese characters
3. Playing back a sample in the configuration window caused the software to crash.

Workarounds

1. Enabling the Note length calculated by GUI front-end (old wavtool.exe behavior) option fixes playback timing issues,
2. Mojibake fix: run installer with LANG=ja-JP.utf8 (and UTAU.exe, every time it is used)
3. Installing ckjfonts fixes lack of japanese characters (essential for using the application); installing fakejapanese_ipamona fixes issues with font legibility on OpenSUSE Leap 15.3
4. Resizing the window horizontally makes menu text appear properly,

What was not tested

MIDI input and output

Hardware tested

Graphics:

• GPU: Unknown
• Driver: open source

Additional Comments

UST files should be opened after changing the UTAU executable command; it should include LANG=ja-JP.utf8