Jamming to Your Own Beat: How to Get Custom Songs and Charts in Project SEKAI

If you have spent any time browsing rhythm game TikToks, YouTube shorts, or community forums, you have almost certainly stumbled across videos of players tackling chaotic, hyper-fast, or completely unreleased custom charts in Project SEKAI: Colorful Stage! (also known as Hatsune Miku: Colorful Stage). Songs like Triple Baka, Aishite Aishite Aishite, or wild internet memes mapped with flawless Project SEKAI mechanics look like a rhythm gamer’s ultimate playground.

Naturally, this leads to the big question every fan asks: Can you get custom songs directly inside the official Project SEKAI app?

The short answer is no—the official game client does not support importing local audio files or fan-made charts. However, the rhythm game community has solved this with a powerful companion app called Sonolus.

This comprehensive, step-by-step guide walks you through how custom tracks actually work, what you need, and how you can start playing custom Project SEKAI charts on your mobile device.

Understanding How Custom Songs Work

Before diving into downloads, it is important to clear up a common misconception. When people talk about playing “custom songs” in Project SEKAI, they aren’t modding the official app downloaded from the App Store or Google Play. Doing that violates terms of service and usually breaks online matching.

Instead, the community uses Sonolus—an audio-visual engine designed to run custom rule sets, skins, and charts for popular rhythm games (including Project SEKAI, BanG Dream!, and osu!). Using Sonolus with a Project SEKAI server configuration gives you an interface that looks, sounds, and plays almost identically to the real game, but opens the floodgates to thousands of custom-made charts and audio tracks.

Step-by-Step: How to Play Custom Project SEKAI Charts

Getting your favorite custom songs up and running takes just a few minutes once you know the workflow.

Step 1: Install the Sonolus App

Because Sonolus acts as the engine that runs these custom Project SEKAI levels, you will need to install it on your iOS or Android device.

• For Android: You can typically download the APK directly from the official Sonolus website or trusted sources.
• For iOS: Because of platform restrictions, installation may require following the official guides on the Sonolus website to sideload or use compatible application installers.

Step 2: Connect to a Project SEKAI Custom Server

Once Sonolus is installed, you need to point it toward a community server that hosts Project SEKAI assets, skins, and custom charts.

1. Open Sonolus and go to the Servers tab.
2. Add a popular public Project SEKAI server link (such as the integration hosted via sonolus.sekai.best or community-favorite repositories like Untitled Charts).
3. Once connected, Sonolus will load the familiar Project SEKAI interface, complete with note designs, flick arrows, and judge lines.

Step 3: Browse and Queue Your Favorite Custom Songs

With the server linked, you can browse an enormous library of user-generated content:

• Level Library: Filter by difficulty, level creator, or song title. You will find everything from meme tracks to incredibly complex master-level technical charts of songs that never made it into the official global or Japanese game versions.
• Downloading & Playing: Simply tap on a chart that catches your eye, let the app download the custom audio file and chart data, and hit play.

Want to Make Your Own?

If playing other people’s creations isn’t enough, you can even craft your own custom charts! Community creators use web-based tools like Next Sekai Editor to map custom MP3 files, line up notes, adjust BPM, and test their creations.

Once a chart is finished, creators upload it to community databases like Untitled Charts. From there, you can generate a QR code, scan it with your phone, and instantly load your very own custom chart into Sonolus to test your thumb-stamina.