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The goal of this article is to describe how to install UTAU on a non-japanese Windows Seven computer, and also without changing the locale to Japanese, using Microsoft's AppLocale. As this is a bit tricky, I thought I could share my experience.

Installing Without AppLocale (windows 7 & 8)

Get Utau from here,, and before you run the installation open start menu, go to the Control panel, look for 'Region and Language' and double click on it. Then go to the 'Administrative' tab, next click on 'Change system locale' and choose Japanese. Lastly restart your laptop and or computer and install Utau. Note- this will not change the system language but enable you to run japanese programs now with no trouble, and without AppLocale, although unless you can read Japanese you arent done, you should scroll down this page and read how to change it's gui into english.

Installing AppLocale

First, install AppLocale: it can be found on On this page, search for AppLocale.
Select the most recent version: you get a 1,391,104 bytes file named "apploc.msi".
Installing it on Windows 7 is tricky and produces an error like this:

AppLocale 01

Use the following method, found on

  1. Click Start, type "cmd" in the search box.
  2. In the list, right click the "cmd" icon, and select "run as administrator"
  3. In the DOS command, copy the apploc.msi file into c:\, e.g. with "copy f:\program\apploc.msi c:\"
  4. In the DOS command, type "cd" then "c:\"
  5. In the DOS command, enter "appLoc.msi" to run the AppLocale installer.
  6. Once this is done you may delete the "appLoc.msi" file in c:\, because it is no longer needed: "del appLoc.msi"
  7. That's it, you may now close the DOS command window.

AppLocale 02

Installing AppLocale (Windows 8)

The overall proccess is the smae of the Windows 7, however, trying to run "cmd" will not allow you to copy the file, saying the "file is not found". However there is an alternative (and easier) way to make it run in Windows 8. First download the "apploc.msi" file, then go to where it is located (e.g "Downloads") and "right click on the file>properties>compatibility>run solution problems of compatiblity". A new window will pop-up, looking like the one to solve Wi-Fi signal problems. Windows will detect the problem. After a few minutes (or seconds), Windows will say "Compatiblity mode: Ignore version verification". Then click on test program and it will pop-up the AppLocale installation screen. Now, just install it normally.

NOTE: My PC is set to Brazilian Portuguese, so some of the commands I stated may be different in english, but with similar names to these ones. A review is needed.

Installing UTAU

Now, get UTAU from
If you never installed UTAU, get the Installer version "v0.2.76 インストーラ", because it will also install the VisualBasic 6 runtime on your computer. For an update, you may get the ZIP version "v0.2.76 zipアーカイブ" instead. In our case, i.e. installing UTAU on a Windows 7 computer without changing its locale to Japanese, we will need both these files.
You get two files, utau0276inst.exe (3,106,816 bytes) and (1,074,635 bytes).

As it is not a Unicode program, we will launch the UTAU installer through AppLocale:

  • Select "Start" -> "Microsoft AppLocale" -> "AppLocale" to start AppLocale.
  • Click Next.
  • Select "Launch an Application".
  • Browse to the location of utau0276inst.exe.

InstallingUtau 01

  • Click Next.
  • AppLocale detects that the installer is in Japanese.

InstallingUtau 02

  • Click Next.
  • We will only do it once, but let's create a shortcut anyway: check the box and name the program "Utau Installer".

InstallingUtau 03

  • There is now a new "Utau Installer" entry in "Start" -> "Microsoft AppLocale" -> "AppLocale".
  • Also, AppLocale starts the UTAU installer. The first panel says "Installer will install UTAU on your computer".
  • Click "次へ" = "Next".

InstallingUtau 04

  • It is better to install Utau outside of "Program Files", because this directory is protected by Windows, and this somewhat conflicts with Utau wanting to put its own configuration files. Use e.g. "c:\Tools\Utau" instead.
  • Select "All users" like in the image below, or "Just me" in the radio button selection at the bottom of the screen.

InstallingUtau 05

  • Click "次へ" = "Next".
  • The panel says "Installer will now install UTAU on your computer"...
  • Click "次へ" = "Next".

InstallingUtau 06

  • A screen is displayed with a progress bar. When done, there is a new shortcut on the desktop.

InstallingUtau 07
There could be a Windows 7 warning: "This program could require administrator privileges". Select "This program is working". We are now done with the installation.

First-time running UTAU

Launch the new UTAU desktop shortcut: it doesn't work and displays gibberish.

RunningUtau 01

RunningUtau 02
Note how the menu entries are badly displayed. In fact, we need to launch UTAU through AppLocale:

  • Select "Start" -> "Microsoft AppLocale" -> "AppLocale" to start AppLocale.
  • Click "Next".
  • Select "Launch an Application".
  • Browse to the location of utau.exe

RunningUtau 03

  • Click "Next".
  • AppLocale detects that UTAU is in Japanese.

RunningUtau 04

  • Click "Next".
  • Create a shortcut: check the box and name the program "Utau". There is now a new "Utau" entry in "Start" -> "Microsoft AppLocale" -> "AppLocale".

RunningUtau 05

  • AppLocale starts UTAU, which starts with an error screen.

RunningUtau 06

  • Let's ignore it for the moment. Click OK: the main panel opens with a proper japanese display.

RunningUtau 07

  • Close the program.
  • Open the "Start" -> "Microsoft AppLocale" -> "AppLocale" menu, right-drag "Utau" to the desktop, then select "Copy here".
  • This new desktop icon now opens UTAU through AppLocale, which also displays an irritating warning.

RunningUtau 08

At this point, we may get rid of the original, useless, Utau desktop icon.

Use UTAU in English

To translate UTAU into english, get the English resource files from You get a 19,641 bytes file containing the english translation of most (not all) of UTAU GUI.

  • Decompress this file somewhere: you get a "res" directory containing a dozen or so of TXT files with strange filenames.
  • Copy or move this "res" directory just under UTAU's installation directory, where this directory does not exist yet, e.g. in "C:\Tools\Utau\res", like this:

RunningUtau 09

  • Reopen UTAU through its desktop icon. If everything is OK, you now have english menus:

RunningUtau 09.5

These translation TXT files are in Unicode; you may edit them with a Unicode-compatible editor like e.g. Notepad++ ( if you want.

Fixing Defoko

Let's take care now of the error message that appears when launching UTAU.
Open the "UTAU\voice\uta" directory: here are a lot of WAV files, and we can see that their filename has been botched during the installation.

RunningUtau 10

  • Remove all the *.wav files, because they are useless, but KEEP the *_wav.frq files also located in thesame directory.
  • Decompress somewhere.
  • From the decompressed "voice\uta" directory, copy mkdefo.exe and aquestalk.dll into "UTAU\voice\uta".

RunningUtau 11

  • Launch mkdefo.exe with AppLocale.

RunningUtau 12

  • This time AppLocale doesn't find the locale to use: force it to be Japanese (日本語).

RunningUtau 13

  • Also, there is no need to create a shortcut this time.

RunningUtau 14

  • When this is done, we now have *.WAV files with proper (japanese) filenames.

RunningUtau 15

  • We may now delete mkdefo.exe and aquestalk.dll from "UTAU\voice\uta".
  • Let's start UTAU again: there is no more error message.
  • Double-click the "UTAU" icon on the upper left: the default voice info screen opens.

RunningUtau 16

  • Click "Sample": you can now hear a sound.

Can't play UST file yet

However, when you load a UST file, no sound can be heard: a DOS box appears for a brief time, and we can glimpse "File load error" displayed in it. We can also see (if we are fast enough) that it executes in "C:\Users\<user name>\AppData\Local\Temp\utau1".

Keep UTAU opened, and let's have a look at this directory. (If UTAU is closed, this temp directory is emptied).

RunningUtau 17

Open temp.bat with e.g. Notepad or Notepad++. We see something like:

@rem project=New Project
@set tempo=120
@set samples=44100
@set oto=C:\Tools\UTAU\voice\uta
@set tool=C:\Tools\UTAU\wavtool.exe
@set resamp=C:\Tools\UTAU\resampler.exe
@set output=temp.wav
@set helper=temp_helper.bat
@set cachedir=C:\Users\<user name>\AppData\Local\Temp\utau1\temp.cache
@set flag=""
@set env=0 5 35 0 100 100 0
@set stp=0

@del "%output%"
@mkdir "%cachedir%"

@set params=100 0 !120 AA#85#
@set vel=100
@set temp="%cachedir%\0_‚ _F#4_500.wav"
call %helper% "%oto%\‚ .wav" F#4 420@120.00+.0 0 0.0 500 52.0 69.0 0

@if not exist "%output%.whd" goto E
@if not exist "%output%.dat" goto E
copy /Y "%output%.whd" /B + "%output%.dat" /B "%output%"
del "%output%.whd"
del "%output%.dat"

We can see in the "call %helper%" line, and the line just before, that we are trying to use an invalid WAV filename: although UTAU runs in Japanese through AppLocale, this is not true for this helper BAT file it uses when creating the sound files. Thus, the BAT files try to use japanese filenames while they are running in the current, non-japanese, locale.

To get rid of this problem, open UTAU, then "Tools" -> "Options" -> "General" tab.
In it, select "use resampler.dll for rendering".

RunningUtau 18

With this, UTAU doesn't use BAT files any more, but a DLL instead: as it it executed within the context of the UTAU application, it inherits its japanese locale and can properly manage japanese files: you can see the generated temporary WAV files in "C:\Users\<user name>\AppData\Local\Temp\utau1\temp.cache".

That's it, you can now play a UST file.

Additional step for non-English Windows Users

HOWEVER !!!! If, like mine, your computer does not run an English version of Windows, UTAU may still be unable to play at this point. If this is the case for you, there is still another step to do.

  • Open UTAU again, select "Tools" -> "Options" -> "General" tab, and UNCHECK "use resampler.dll".
  • Try to play something, a DOS box opens.
  • Now, open "temp.bat" in "C:\Users\<user name>\AppData\Local\Temp\utau1".
  • On my computer, this gives something like this:
    @rem project=Rain Miku
    @set tempo=120
    @set samples=44100
    @set oto=C:\Tools\UTAU\voice\KasaneTeto
    @set tool=C:\Tools\UTAU\wavtool.exe
    @set resamp=C:\Tools\UTAU\resampler.exe
    @set output=temp.wav
    @set helper=temp_helper.bat
    @set cachedir=C:\Data\Audio\Rain\Rain.cache
    @set flag="Y0C99"
    @set env=0 5 35 0 100 100 0
    @set stp=0

    @del "%output%"
    @mkdir "%cachedir%"

    @set params=81 0 !120 AA#54#ABACAEAHALANAOAPAPAOANAMAKAIAGADAA/+/7/5/2/0/z/0/2/4/7/+AA#1#
    @set flag="B60Y0C99"
    @set vel=100
    @set temp="%cachedir%\0_‚Ð_E4_500.wav"
    call %helper% "%oto%\‚Ð.wav" E4 415@120,00+,0 0 0,0 500 0,0 0,0 0

    @if not exist "%output%.whd" goto E
    @if not exist "%output%.dat" goto E
    copy /Y "%output%.whd" /B + "%output%.dat" /B "%output%"
    del "%output%.whd"
    del "%output%.dat"

Carefully examine the "call %helper%" line: the floating-point values "120.00" "0,0" "0,0" are written here with a comma "120,00" instead of a dot. This is because my (non-english) locale uses a comma "," as a floating-point separator instead of a dot ".". Due to this, the program fails to properly parse its command line arguments, and the generated WAV file is incorrect.

  • To fix it, open "ControlPanel" -> "Regional and Language Options" -> "Formats" tab -> "Customize this format" -> "Numbers" tab.
  • Here "Decimal Symbol" is a comma ",": change it to a dot ".".

RunningUtau 19

  • Close the control panel.
  • Close UTAU.
  • Open UTAU again, select "Tools" -> "Options" -> "General" tab, and check "use resampler.dll for rendering" again.
  • Try to play something. If you forgot the previous step, a DOS box opens and nothing is heard.

That's it: you can now play a japanese UST on your computer, whithout having to reboot when changing the non-Unicode locale to Japanese.

Next time, we will see how to enter lyrics in Romaji.

Converting hiragana voicebanks into romaji voicebanks

enable caption on this video to see instructions.
Original version:
English version: