CHUNITHM SUN PLUS Common Problems/Tips
I'm having audio issues
CHUNITHM expects a specific Default Format from your sound card.
In Windows, go to Playback Devices and then right click on your default device and go to Properties. From there, hit the Advanced tab and set your Default Format to 16bit, 48000 Hz (DVD Quality) and check both of the options inside Exclusive Mode as pictured.
By default, CHUNITHM uses Exclusive Audio. This means you won't be able to hear any other sounds from your PC while the game is running. A Shared Audio mode can be enabled via the chusanApp.exe Patcher website, though it should be noted that this can increase audio latency.
Some of my installed Songs and Events aren't visible in game
Some content in CHUNITHM is locked behind event maps, or other requirements, such as playing the same song on another SEGA game, such as maimai.
We can force unlock this content, making it always available in game.
Download the Chunithm_Unlocker powershell script, and place it in your game folder, next to the App and Option folders.
Right click the file, and select Run with Powershell.
Once the script has scanned your game files, it will present you with several options for unlocking different types of content. You can either unlock everything, or only unlock specific things (such as songs), leaving the other content to be unlocked via regular gameplay.
The Chunithm_Unlocker script creates backups of any file it modifies, and has options to restore the files back to their original state. Please note that certain content (such as character unlocks) are sent to the server and saved to your profile, so reverting the unlock in your game files won't always relock that content for your game profile.
My game takes a long time to boot
The game files for CHUNITHM consists of thousands of small .xml files, and Windows Defender is known to spend a long time scanning through them during game boot up.
One way to massively speed up boot times is to add the entire game folder as a Windows Defender Exception.
Warning:
Doing this will prevent Defender from scanning your game folder for viruses. Only do this if you trust the source of your data.
Open Virus & threat protection.
Under Virus & threat protection settings click the Manage Settings button.
Scroll down to Exclusions and click on Add or remove exclusions.
Click the Add an exclusion button, select the folder option, navigate to the base of your game install and click Select Folder.
My game crashes when I alt-tab out of fullscreen
As the game is intended to run on dedicated hardware, it doesn't like to be minimised.
One work-around for this is to use DXVK to run the game with Vulkan rather than Direct3D. This has the added benefit of smoother frame rates for some hardware configurations.
Download the latest version of DXVK from the releases tab. This will be a dxvk-x.x.tar.gz file. Open the file with 7zip and navigate to the x32 folder.
Extract the d3d9.dll file to your \CHUNITHMSUNPLUS\App\bin\ folder, alongside your chusanApp.exe.
You should now be able to tab out of fullscreeen, leaving the game running.
Additional DXVK configuration:
DXVK has other options that can be changed by adding a dxvk.conf file next to the d3d9.dll file. The most common use for this is to add an FPS counter to the game.
If you wish to have an FPS counter, create a dxvk.conf file and open it with Notepad++. Add the following line.
Controller inputs whilst minimised:
As the game was never designed to be minimised, it will not ignore inputs when not focused. This means any controller inputs will be accepted, so try not to lean on your slider while tabbed out!
The most common issue this causes is when typing the number 1 with the game minimised, as by default this will enter the test menu. If you were mid-credit, your scores will be lost.
If you wish to change the keyboard keys assigned to the Test, Service and Coin buttons, this can be configured in the [io3] section of segatools.ini.
My game occasionally drops frames/stutters
While frame drops can be caused by running the game on under-powered hardware, it is also common for this to happen when running on hardware that is too over-powered!
As a lot of the game consists of mostly 2D assets, your GPU is unlikely to be pushed very hard. Modern GPUs attempt to be as energy efficient as possible by changing power-states when under-utilised. If these power-state changes happen mid song, this can lead to slight frame drops and stutters.
This can be solved by forcing the GPU to stay in its maximum power-state while the game is running.
NVIDIA:
In the Windows Taskbar Icon Tray, right click the NVIDIA Settings icon, and select NVIDIA Control Panel.
On the left, select Manage 3D settings.
On the right, click on the Program Settings tab.
Click the add button, and navigate to your \CHUNITHMSUNPLUS\App\bin\ folder, and select chusanApp.exe.
In the Feature list, scroll down to Power management mode and select Prefer maximum performance.
Save your settings and close NVIDIA Control Panel. Your game will now always run in the highest power-state!
AMD:
In the Windows Taskbar Icon Tray, right click the AMD Software icon, and select Open AMD Software: Adrenalin Edition.
At the top of the window, select the Gaming tab.
If chusanApp isn't already listed in your Games Library, click on the 3 dots at the top right of the window, then click on Add A Game.... Navigate to your \CHUNITHMSUNPLUS\App\bin\ folder, and select chusanApp.exe.
Select chusanApp from the Games Library.
Under the Graphics section, set the Graphics Profile to Performance.
AMD, continued:
While the above will help to reduce any issues, it's not quite the same as the Power management mode offered by NVIDIA.
A similar configuration can be achieved by adding a custom Overlocking Game Profile in the Performance > Tuning section of the AMD Software, and increasing the minimum GPU Frequency for each State.
As these settings will vary wildly from one GPU to another, and as overclocking comes with its own risks, specifics for this won't be included on this page.