Convert WAV to BRSTM online for Wii music mods, with loop points from the WAV kept. Upload files up to 20GB and download the converted result in a few clicks.
Convert BRSTM to WAVDrag & Drop your WAV file here
WAV 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 WAV file
Drag and drop a .wav file or select it from your device. For a looping BRSTM, set loop points in Wavosaur, Awave or a sampler editor first, so they are saved in the WAV's smpl chunk.
02
Convert to BRSTM
Keep BRSTM as the output format and start. The audio is encoded as 4-bit DSP-ADPCM, about 400 kbps for 44.1 kHz stereo.
03
Download the BRSTM
Download one .brstm file per WAV and play it in vgmstream or a player built on it.
WAV
WAV is a RIFF-based audio format commonly used for uncompressed PCM audio. Audio editors, recorders and game audio tools such as vgmstream save WAV files, and loop editors such as Wavosaur store loop points in its smpl chunk.
BRSTM
BRSTM is the Nintendo Wii's streamed audio format (RSTM), used for background music in games such as Mario Kart Wii and Super Smash Bros. Brawl. It usually holds 4-bit DSP-ADPCM audio, can store a loop and can group channels into several tracks. Music modders and vgmstream-based players use it.
FILE FORMATS
SOURCE
Microsoft and IBM defined WAV in 1991. It normally stores plain PCM audio with no compression, which is why editors, DAWs, broadcast systems and speech tools accept it without question. The price is size: CD-quality stereo takes about 10 MB per minute, and tagging support is limited.
TARGET
BRSTM is the Wii's streamed music format, holding DSP-ADPCM or PCM audio with loop points so a track repeats without a gap. Mario Kart Wii, Super Smash Bros. Brawl and many other Wii games use it, and custom music mods replace game tracks with new BRSTM files.
| Feature | WAV | BRSTM |
|---|---|---|
| Developed by | Microsoft and IBM | Nintendo |
| File extension | .wav | .brstm |
| Compression | None (PCM) | DSP-ADPCM or PCM |
| Size vs uncompressed WAV | Same size (1:1) | About 1/4 (ADPCM) |
| Tags and cover art | Basic text tags, no cover art | Loop points, no tags |
| Best for | Editing, mastering, speech tools | Wii game music and mods |
| Plays on phones and browsers | Yes | No, needs vgmstream |
USE CASES
Practical workflows where WAV to BRSTM conversion is useful.
Replace music in a Wii game mod
Make a looping BRSTM for a Mario Kart Wii or Super Smash Bros. Brawl music mod from a WAV with smpl loop points, so the song repeats from its loop start instead of stopping.
Re-loop an extracted song
Move the loop points of a song in a loop editor, then convert. The BRSTM loops at the new points, with the loop start moved to the next DSP block, at most 14,336 samples later (about 0.3 s at 48 kHz, 0.45 s at 32 kHz).
Edit a multi-track stream and put it back
Decode a multi-track BRSTM, such as a New Super Mario Bros. Wii or Skyward Sword stream, with our BRSTM-to-WAV tool, edit the WAV, set loop points again in a loop editor, and convert it back. Every track is kept.
Mix a surround track down for the Wii
A 5.1 or 7.1 WAV with a speaker layout (channel mask) is mixed down to stereo, so a surround mix becomes a regular one-track stereo BRSTM.
Convert a 96 kHz master
WAVs above 48 kHz, such as 96 or 192 kHz masters, become 48 kHz BRSTMs, with loop points rescaled to the new rate.
Keep a mono sound mono
A mono WAV, such as an ambience bed or a voice clip, becomes a one-channel BRSTM instead of being doubled to stereo.
Add music to a Wii homebrew game
Homebrew developers can turn their own WAV music into looping or one-shot BRSTM streams for a Wii homebrew project.
Make BRSTM test files for tools
Authors of BRSTM players, parsers and modding tools can make test streams from WAVs: mono, stereo, looping or multi-track.
Use sounds from an old sample library
WAVs stored as A-law, GSM, IMA ADPCM or Microsoft ADPCM, or MP3 inside WAV, convert directly without saving them as PCM first.
Rescue an unfinished recording
A WAV from a crashed recording or a stream capture whose header sizes were never filled in still converts to BRSTM.
SUPPORTED FILES
Most kinds of WAV are supported, including looped ones.
Loops in a smpl chunk are kept, so the track repeats in game.
Multi-track WAVs stay multi-track.
Common WAV encodings are read.
Large and broadcast WAVs work.
Custom music for Wii games that use BRSTM.
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 loop start moves forward to the next DSP block, at most about 0.3 seconds at 44.1 or 48 kHz, while the loop length stays the same.
02
Add loop points to a smpl chunk in Wavosaur or Awave before converting.
03
The game probably expects a different sample rate. Check an original file from the game and match its rate before converting.
04
Mario Kart Wii uses a separate _f file for the final lap. Convert a faster version of the track as well.
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.
VGAudio, LoopingAudioConverter and BrawlCrate encode Nintendo and CRI formats once installed. dragdropdo runs VGAudio in the browser, so you can turn WAV into BRSTM on any device.
| What matters | dragdropdo | VGAudio and Desktop Tools |
|---|---|---|
| Nothing to install | ✓Yes. Runs in any modern browser. | ~Yes. Windows tools or the .NET command line. |
| Works on phones and tablets | ✓Yes. Desktop, Android, iPhone and iPad. | ~No. Desktop only. |
| Batch conversion | ✓Yes. Add many files and download one ZIP. | ~Yes, with LoopingAudioConverter or scripts. |
| 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. | ~Free. |
| Setting loop points | ✓Read from a WAV's smpl chunk. MP3 sources play once. | ~Yes. Most let you type 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 WAV to BRSTM 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 WAV TOOLS
WAV (Waveform Audio File Format) is a standard audio file format used for storing waveform data. It delivers high-quality audio and is widely used in professional environments for music production and sound design. With its uncompressed format, WAV files ensure top fidelity, making them ideal for editing and mastering. Perfect for audio enthusiasts and professionals alike, WAV files guarantee an exceptional listening experience.
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FAQ
Answers to common questions about dragdropdo's WAV to BRSTM converter.
