How to Auto‑Create Beatmaps in Osu! – Master Guide

Ever stared at a song you love and wondered how to turn it into a playable Osu! beatmap without spending hours on the editor? You’re not alone. The community has built a handful of tools that can generate beatmaps automatically, handling timing points, hit‑objects, and even basic difficulty settings. This guide walks you through the whole process, from choosing the right software to fine‑tuning the result so it feels like a hand‑crafted map.

Why Use an AutoCreator?

Creating a beatmap manually is an art, but it can also be tedious—especially for beginners or for those who want to experiment with many songs quickly. AutoCreators help you:

• Save time: Generate a full map in minutes rather than days.
• Get a solid base: Start with reasonable timing and placement, then tweak what matters.
• Learn faster: See how the tool interprets the music and use that as a teaching aid.

Getting Started: Required Tools

The most popular auto‑mapper for Osu! is Osu! Beatmap AutoCreator (OBA). It’s free, open‑source, and works on Windows, macOS, and Linux. You’ll also need:

• The latest stable Osu! client (installed and logged in).
• A decent audio file (MP3, OGG, or WAV) with a clear rhythm.
• Optional: osu-tools for extra processing like BPM detection.

Step‑by‑Step: From Song to Beatmap

1. Install OBA

Download the zip from the GitHub releases page, extract it, and run OBA.exe. The first launch may prompt you to locate your Osu! installation folder—point it to the folder containing osu!.exe.

2. Prepare Your Audio

Drop the audio file into OBA’s Input tab. The program will automatically scan the file and suggest a BPM. If the detection looks off, click Manual BPM and type the correct value. A quick tip: songs with clear drum beats usually yield more accurate results.

3. Choose Mapping Options

OBA offers several presets:

• Standard – balanced spacing, good for most genres.
• Hard – tighter spacing, higher difficulty.
• Relaxed – more generous timing windows, ideal for beginners.

Select one that matches the skill level you’re aiming for. You can always modify individual hit‑objects later.

4. Generate the Map

Click Create Beatmap. OBA will process the audio, place hit‑circles on beats, and add sliders based on detected melody lines. Within seconds you’ll see a preview with the song’s waveform and the generated objects.

5. Export and Open in Osu!

Hit Save and choose a destination folder. The tool creates a .osu file along with a audio.mp3 copy. Open Osu!, go to File → Open…, and select the new .osu file. The map will appear in your library ready for a test run.

Fine‑Tuning Tips

Even the best auto‑mapper can miss nuances. Here are a few quick adjustments that make a world of difference:

• Timing Points: Open the timing panel (shortcut Ctrl+T) and ensure there are no unexpected BPM changes. Merge or split points as needed.
• Hit‑Object Placement: Zoom into tricky sections. Drag misaligned circles a little left or right to match the music’s accent.
• Slider Length: Shorten overly long sliders that feel unnatural, especially in fast‑tempo tracks.
• Difficulty Settings: In the Difficulty tab, tweak OD, HP, and overall star rating to suit your target audience.

Common Pitfalls and How to Avoid Them

When you first try auto‑creation, a few issues tend to pop up:

• Ghost beats: The tool may place objects on silent parts. Scan the waveform and delete any stray circles.
• Over‑populated sections: Fast songs sometimes get crowded with hit‑circles. Reduce density by selecting the Relaxed preset or manually removing some objects.
• Audio sync problems: If the beatmap feels out of sync, double‑check the BPM and offset settings in the timing panel.

Advanced: Using Scripts for Batch Processing

If you have a whole playlist you want to auto‑map, consider writing a simple batch script. The OBA command‑line interface accepts parameters like --input, --bpm, and --preset. A typical Windows batch file might look like:

for %%f in (*.mp3) do (
OBA.exe --input "%%f" --preset standard --output "maps\%%~nf.osu"
)

This loop processes every MP3 in the folder and drops the resulting .osu files into a maps directory. Linux users can achieve the same with a short Bash script.

Sharing Your Creation

Once you’re happy with the map, upload it to the Osu! Beatmap Submission portal. Fill out the description, tag the song’s artist, and select an appropriate difficulty tier. The community will often give feedback—use it to refine the map further.

Final Thoughts

Auto‑creating beatmaps isn’t a shortcut that eliminates the creative side; it’s a springboard. By letting the software handle the grunt work, you free up mental bandwidth for the artistic decisions that truly define a great map. Dive in, experiment with different presets, and remember that a few minutes of polishing can turn a machine‑generated track into a player‑favorite.