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CHUNITHM SUN

Please make sure you downloaded your data from an appropriate source.
This guide is unable to troubleshoot any problems related to bad or poorly managed data.

If you're coming from a previous version of CHUNITHM

You'll want to create a new folder for the game and start from scratch. CHUNITHM DOES NOT like being extracted over old data!

Preparing data

There are currently issues with running game data in the E:\ or Y:\ drive.
Please extract the data into other drives.

After downloading and extracting your data, we need to make sure your files aren't set to Read-only.

  • Right click the folder containing your data, then click on Properties.
  • In the General tab go down to Attributes, untick Read-only and click Apply.
  • A popup will appear, select Apply changes to this folder, subfolder and files and press OK.
  • Finally, click OK again to exit out of properties.

You should end up with a file structure as follows.

Create another empty folder named AppData next to them. It should now look like below.

The App folder should have a file structure as follows.

If your data doesn't look like this

If your data looks like the third image:

  • Create an App folder and move all files and folders from the image inside of it.
  • Create empty folders named amfs, Option and AppData next to the App folder.

If extra files are present next to your folders, such as executables, scripts, etc.. remove them. This also means your data was tampered with and we strongly recommend getting new data from somewhere else.

Updating the base game

Extract your patch's files to your existing data in a way that matches its file structure. Agree to overwrite files if necessary.

Installing option data

CHUNITHM content updates are distributed through option folders instead of patching the base game. They are named A???, with each ? being a number. Custom options distributed by the community might use letters instead, to distinguish them from official ones.

Extract any options you've downloaded into the Option folder. You should end up with a file structure as follows. Do not be worried if you have fewer or more option folders.

Installing ICFs

Install Configuration Files (ICFs) tell the game what version it is. Without this your game cannot go online!

If your amfs folder already has a file named ICF1, skip this step.

Otherwise, obtain copies of ICF1 for your game version and place it in the amfs folder. If it is named something else, rename it to exactly ICF1 without any file extensions.

Showing file extensions

By default, file extensions on Windows are hidden. Enable them by navigating to the View tab in File Explorer and select File name extensions.

Installing unprotected executables

CHUNITHM executables are protected and will not run on a regular computer.

Obtained unprotected (also called "unpacked" or "decrypted" by the community) copies of chusanApp.exe and amdaemon.exe for your game version. If these weren't provided with your data, join the Discord for assistance.

Copy chusanApp.exe and amdaemon.exe to the bin folder of your game data. Agree to overwrite when asked.

Patching the game

Go through the Web Patching guide to learn how to use a web patcher.

There are many patches for CHUNITHM.

We will only bring up the ones we think could be genuinely useful.

As a general rule of thumb, if you're not sure what a patch does or you're not absolutely certain you need it, leave it alone, regardless of recommendations below.

Patch Recommendation Description
Force shared audio mode Either Force the game to use shared mode audio output, letting you listen to other audio sources while the game is running at the cost of audio latency.
Force 2 channel audio output Either Try enabling this patch if you don't get audio output at all.
Disable song select timer Either Disables the song select timer.
No encryption ON Disable encrypting network requests. Required if you plan to run a local server.
No TLS ON Disable checking if the server is HTTPS or not. Required if you plan to run a local server.
Bypass 1080p monitor check Either Disable checking if the monitor is 1080p when enabling 120FPS. Enable if you cannot set your monitor to 1080p.
Bypass 120Hz monitor check Either Disable checking if the monitor is exactly 120Hz when enabling 120FPS. Enable if you cannot set your monitor to 120Hz.

Installing segatools

  • Head over to segatools releases and download segatools.zip. Do not download the source code.
  • Extracting the archive should give you a few more zip files. Find chusan.zip and extract it to the App\bin folder in your game data.

You should now have a few more files inside the folder, as highlighted:

Configuring segatools

Since there is no graphical configuration tool for segatools, you will have to edit the configuration file by hand. It is found in App\bin\segatools.ini.

It is recommended that you follow along using a text editor with syntax highlighting such as Notepad++.

Each following sub-section will correspond to a section in segatools.ini. If any section is not mentioned, you can skip them.

Warning

If a key already exists in the section, delete everything after = and replace it with your setting. Do not add another key.

[gpio]
dipsw2=1
dipsw2=1 ; WRONG!

[vfs]

If you've been matching the file structure as described in the Preparing data section, you can fill in this section with the values below:

[vfs]
amfs=../../amfs
option=../../Option
appdata=../../AppData

[gpio]

  • If you have a 120Hz monitor, set dipsw2 and dipsw3 to 0:
[gpio]
dipsw2=0
dipsw3=0
  • If you have a 60Hz monitor, set dipsw2 and dipsw3 to 1:
[gpio]
dipsw2=1
dipsw3=1

[gfx]

  • Set windowed to 0 to run in fullscreen mode and 1 to run in windowed mode.
  • If you have multiple monitors and you're running in fullscreen mode (windowed=0), set monitor to the index of the monitor you want to run the game on.
Getting the monitor index

Navigate to Windows display settings. Each monitor should be assigned a number. The monitor index is that number minus one. For example, monitor 2 means monitor index 1.

Connecting to a network

Please choose one of the two solutions, not both!

Remote (Online Network)

Head to the [dns] section inside segatools.ini. Set default to the address provided by your network. Do not add http:// or https:// to the address!

[dns]
default=network.example

Then, head to the [keychip] section and set id to the keychip ID provided by your network:

[keychip]
id=A69E-XXXXXXXXXXX

Finally, you need a card number. Create a file named aime.txt inside App\bin\DEVICE and type in your 20-digit access code if you already have one, or make one up if you don't. If you're making one up, the access code MUST NOT start with a 3.

Local (ARTEMiS/AquaDX)

Both of these options require non-trivial setup. Refer to the official guides for ARTEMiS and AquaDX to set up a local server.

Pre-launch requirements

These steps are required, otherwise your game won't run.

VCRedist & DirectX

Audio

  • Right-click on the volume setting in your taskbar and select Sounds.
  • Navigate to the Playback tab, right click on your default audio device, and click on Properties.
  • Go to the Advanced tab.
  • Check both boxes under Exclusive Mode.
  • Open the Default Format dropdown.
  • Pick either 16 bit, 48000Hz (DVD Quality) or 24 bit, 48000Hz (Studio Quality), click Apply, then OK.

Fixing OpenSSL on Intel 10th Gen and newer CPUs

If you have an Intel 10th Gen CPU or newer, right click App\bin\start.bat, select Edit, and add the highlighted line to the top of the file.

@echo off
set OPENSSL_ia32cap=:~0x20000000

pushd %~dp0
...

First launch

If you have any issues running the game, refer to the Troubleshooting page.

Tip

Without an English patch, the service menu will be in Japanese. If you don't know Japanese, Google Lens is a handy tool for navigating this menu.

GAME ASSIGNMENTS

If you've followed all instructions correctly, you're now finally ready to launch the game!

Start the game by running App\bin\start.bat. Let the game load until it reaches the screen below.

Press your Test button (default F1) to enter the service menu. Use the Service button (default F2) to navigate the menu, and Test button to select an option.

Navigate to ゲーム設定 (GAME ASSIGNMENTS, the 4th option).

Select グループ内基準機設定 (SET STANDARD IN GROUP, the second option) and toggle this setting to 基準機 (STANDARD).

Select 終了 (EXIT, the last option) to exit to the main service menu.

CLOSE SETTING

Navigate to 閉店設定 (CLOSE SETTING, the 10th option).

Navigate to 時 (HOUR, the 2nd option) and use the Service button to toggle the setting until it says 全時刻 (ALL TIME).

Select 終了 (EXIT, the last option) to exit to the main service menu, then select 終了 (also the last option) in the main menu to exit the service menu.

Waiting for Distribution Server

If you're stuck at the Waiting for Distribution Server screen below, close the game and relaunch.

You're all done! The game should load up properly now.

You can add coins using the Coin key (default F3) and card in by holding the Enter key.

Further configuration

Input methods and controllers are covered in the Controllers page.

Have any other issues?

Check out the Troubleshooting and Error Codes pages.