Turn OGG audio into CRI ADX online for game-audio projects, with the sample rate kept. Upload files up to 20GB and download the converted result in a few clicks.
Drag & Drop your OGG file here
OGG files, up to 20GB
Files stay private.
Automatically deleted after 24 hours.
Link
20GB upload limit.
4.8/5
Trusted for 1,827,796+ conversions
HOW IT WORKS
Three steps, no account, nothing to install.
01
Upload your OGG file
Drag and drop an .ogg file or select it from your device. Ogg video files with Theora pictures work too; their soundtrack is converted.
02
Convert to ADX
Keep ADX as the output format and start. The audio is encoded as ADX 4-bit ADPCM, about 400 kbps for 44.1 kHz stereo, with the same encoder as our MP3 to ADX tool.
03
Download the ADX
Download one .adx file per OGG and play it in vgmstream or a player built on it.
OGG
OGG is an open, royalty-free container that most often holds Vorbis or Opus audio, and sometimes FLAC, Speex or Theora video. Many PC games, including RPG Maker projects, ship their music as OGG, and most media players and browsers play it.
ADX
ADX is CRI Middleware's 4-bit ADPCM audio format, used for music and voices in many Sega Dreamcast games and in later console and PC games built on CRI audio. It can store a loop. CRI-based games and vgmstream-based players read the standard header type 3 ADX this converter writes.
FILE FORMATS
SOURCE
An .ogg file is audio in Xiph.Org's open Ogg container, usually Vorbis and sometimes Opus or FLAC. Ogg Vorbis is royalty-free, so game engines such as Unity, Godot and RPG Maker, Minecraft resource packs and many open-source apps use it. Android, Chrome and Firefox play it; older iPhones and some car stereos don't.
TARGET
CRI Middleware's audio format, built for games. ADX uses 4-bit ADPCM, about a quarter the size of 16-bit WAV, so it decodes cheaply during gameplay and supports gapless loops. It shipped on the Sega Dreamcast and in many later console and PC games, and its newer successor is HCA.
| Feature | OGG | ADX |
|---|---|---|
| Developed by | Xiph.Org | CRI Middleware |
| File extension | .ogg | .adx |
| Compression | Lossy (Vorbis) mostly | Lossy (ADPCM) |
| Size vs uncompressed WAV | About 1/8 | About 1/4 |
| Tags and cover art | Vorbis comments | None (loop data only) |
| Best for | Games and open-source apps | Game music, voice and effects |
| Plays on phones and browsers | Android, Chrome, Firefox | No, needs a game engine or vgmstream |
USE CASES
Practical workflows where OGG to ADX conversion is useful.
Replace a song in a CRI-based game
Modders swapping a song in a game that reads standard ADX can start from an OGG Vorbis or Opus file instead of converting it to WAV first.
Convert RPG Maker music
RPG Maker projects store their music as OGG. The audio converts, but the LOOPSTART and LOOPLENGTH tags are ignored, so the ADX plays once.
Use voice lines recorded as Opus
Voice recordings from chat apps and browser recorders often arrive as Ogg Opus. Each becomes an ADX at 48 kHz, the rate Opus is always decoded at.
Pull the soundtrack from an Ogg video
An Ogg file with Theora video gives its soundtrack as an ADX, so you don't need to extract the audio first.
Turn a 5.1 Vorbis mix into stereo ADX
5.1 and 7.1 OGG files are mixed down to stereo instead of failing, since ADX holds only mono or stereo.
Convert asset-pack sound effects
Sound effects from game asset packs, which often come as OGG Vorbis, convert to ADX one by one or in a batch for a homebrew or mod project.
Encode FLAC-in-Ogg recordings
Archived recordings stored as FLAC inside an Ogg container convert directly to ADX, at their original sample rate.
Convert old 8 kHz Speex voice clips
Narrowband (8 kHz) Ogg Speex recordings convert to ADX at their original rate.
Make ADX test files for tools
Developers testing an ADX decoder or player can make standard header type 3 ADX files from everyday OGG files.
Add music to Dreamcast homebrew
Dreamcast homebrew developers can encode OGG music as ADX, the format many Dreamcast games used for their music.
SUPPORTED FILES
Start from the best OGG you have.
The usual .ogg music and effects.
Decoded before encoding to ADX.
Narrowband Speex converts; wideband Speex is refused.
The soundtrack of a Theora video is used.
If you have WAV or FLAC, use those converters for a cleaner ADX.
Only convert audio you own or have permission to use. Having a file doesn't automatically give you the right to put it into someone else's game.
TROUBLESHOOTING
Most problems come down to settings the game expects, not the conversion itself.
01
The game probably expects a different sample rate. Check an original file from the game and match its rate before converting.
02
Many commercial games use encrypted ADX with a game-specific key. A standard ADX may not play in those titles.
03
The ADX has no loop points. RPG Maker-style LOOPSTART tags in the OGG are ignored; add loops in your ADX tool.
04
16 and 32 kHz Speex would decode at half speed, so it's refused with a message.
05
Compare your track's loudness with the game's other audio and adjust it before converting.
06
Make sure the new file uses the exact name and folder of the one it replaces, then test it in the actual game or build.
Desktop encoders and CRI's own tools are built for full game-audio pipelines. dragdropdo is built for getting an ADX file quickly, from any device.
| What matters | dragdropdo | Desktop ADX Tools |
|---|---|---|
| Nothing to install | ✓Yes. Runs in any modern browser. | ~Usually a download, and often command-line setup. |
| Works on phones and tablets | ✓Yes. Desktop, Android, iPhone and iPad. | ~Most are built for Windows or the command line. |
| Batch conversion | ✓Yes. Add many files and download one ZIP. | ~Varies by tool. Often needs scripting. |
| Share finished files | ✓Yes. Send a unique link from the result page. | ~You upload and share the files yourself. |
| Pricing | ✓Free with daily limits. $2.99 or $6.99 passes for unlimited use, no monthly plan. | ~Ranges from free community tools to licensed middleware. |
| Setting loop points | ✓Not in the converter. Add loops afterwards in your engine or ADX tool. | ~Dedicated ADX tools often let you set loop points directly. |
Other tools use different pricing, limits and workflows. This comparison describes dragdropdo's own features without assuming every other tool works the same way.
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WHY DRAGDROPDO
Convert OGG to ADX in your browser, with nothing to install and nothing kept after 24 hours.
Private by default
Files are encrypted in transit and deleted from our servers automatically after 24 hours.
No install required
Convert in any modern browser on Windows, Mac, Linux, Android, iPhone or iPad. No app and no sign-up wall.
Big files and batches
Upload files up to 20GB each, add several at once, and download the results one by one or as a ZIP.
Share & download
Save finished files to your device or pass them on with a share link from the result page.
MORE OGG TOOLS
OGG is a free, open-source audio format that delivers high-quality sound with smaller file sizes. Supported by most modern players and browsers, OGG is widely used for music, podcasts, and streaming thanks to its royalty-free and efficient compression.
Explore all tools
FAQ
Answers to common questions about dragdropdo's OGG to ADX converter.
