CombinedAudioTool 3DS

CombinedAudioTool
General
Author	Cracko298, YT-Toaster
Type	Hack Utilities
Version	2.7.1
License	Apache-2.0
Last Updated	2026/05/01
Links
Download
Website
Source

A Tool (GUI/CLI) for CombinedAudio.bin for Minecraft for New Nintendo 3DS Edition (MC3DS) with a plethora of Features.

Only support Windows Platforms Officially, due to being built and made using some Windows API functions (winsound).

View the Documentation of CombinedAudio.bin Here.

Features

• Extract All FSB SoundBank Files from CombinedAudio.bin.
• Play, Pause, Seek, Restart, Search through Audio Tracks.
• Gain information about metadata, the Archive itself, and more.
• Convert between formats, including *.wav, *.dsp, *.fsb.
• Convert Songs, Add SFX, and Extract Segments/Header information.

Requirements

Requires Python 3.12 (or) Python 3.14 for the Script.

• You can use Python 3.10/3.11/3.13, however it will be insanely slow at encoding.
• Python STD (Installed alongside Python).
• numpy
• soundfile (libsoundfile Wrapper for Python).

Screenshots

Changelog

v2.7.1 2026/05/01

• Add Stereo support to CombinedAudio.bin directly, I forgor to release this patch oopsies...

v2.7 2026/05/01

• Stereo Audio is Fixed.
• Bug Fixes, and performance improvements.
• Supports every audio format to FSB Music Files.
• Huge performance boost (thanks to C-Python and PYD).

v2.6 2026/04/24

• Now support(s) *.mp3, *.ogg, *.oga, *.opus, *.flac, *.dsp, *.fsb audio formats.

v2.5 2026/04/23

• No longer a CLI, it's now a GUI *gasp*.
• Play sounds like Foobar2000's VGMStream.
• Seek, Play, Restart, Replace, Extract, Rebuild, and everything else you can think of to CombinedAudio.bin.
• Copy developer information, make edits, and more!

v2.4 2024/12/04

• Fixed a bug where FSB, DSP wouldn't convert to Wave Files using the --atw or to-wave flag.
• Added new MetaData Structuring for more info on CombinedAudio.bin SFX Archive.
• Fixed the --gsid flag so it now includes information retaining to which file each sound is tied too.
• Other under the hood bug fixes/changes that make no real difference (e.g. removing blank space lines, etc).

v2.3 2024/10/04

• Added Interweaving Changes/Functions.

v2.2 2024/08/02

• Bug Found in Old Release Causing full Script Lockout.
  • Thank you @SpeakerZ-01 for spotting and correcting the bug that wasn't found durring the development of version 2.1.

v2.1 2024/07/25

• Get MetaData from the CombinedAudio.bin Archive.
• Get alerted when a New Version a CATool is available to Update too!!!
• Updated a Few Descriptions of Flags/Args inside of the --help Flag.

v2.0 2024/07/03

• Can now fully add your Own Custom Audio into Minecraft Nintendo 3DS Edition!
• Updated addPadding Function to update the Length of the File (in the header), reducing the chance for Crashes, among Audio Corruption.
• Fixed a bug that stated --gsmc was the correct way to Launch generate-music Function.

v1.9 2024/07/01

• Download and FFMPEG Usage.
• Convert all Common Audio Formats to Wave (no need for Online Tools).

v1.8 2024/06/30

• Feature Update:
  • Encode Music for Minecraft 3DS Edition using the generate-music flag (--gmsc).
  • Restore now restores your Current Version rather than updating the entire Installation.
  • Fixed requests Module installation package not properly installing.

v1.7 2024/06/27

• Feature Update:
  • Convert *.wav Files into Valid DSADPCM/GCADPCM.
  • Can now play *.wav Files using the Windows API.

v1.6 2024/06/23

• Added Restore Feature:
  • Only use in Emergencies like File integrity is invalid: --rstr.

v1.5 2024/06/23

• Support for GCADPCM Extracting:
  • Extract audio as you normally would, now with an extra feature-set.

v1.4 2024/06/21

• Feature Update:
  • Attempt to Extract Audio from FSB Files.
  • Update Feature has been updated slightly.
  • Make sure to Extract this file when downloading via Script Download Feature.

v1.3 2024/06/19

• Added Update Feature:
  • No need to download from Latest Releases after this version.
  • Update your script using the following Flags: update (--upd).
  • Updated Sound ID and Extraction to be again much more accurate.

v1.2 2024/06/19

• Feature Update:
  • Added 2 new Features and Flags, get-size-seg, and get-size.
  • get-size-seg (--gssg) Gets the size of a specific Segment Soundbank FSB File.
  • get-size (--gs) Gets the size of all Segment Soundbank FSB Files.

v1.1 2024/06/19

• Feature Update:
  • New Flags get-soundid, and rename-all.
  • Updated name-extract to be much more accurate instead of assuming the Sound Name/ID.

v1.0 2024/06/19

• First Release.
• Features and docs are provided apon the homepage.

External links

• GitHub - https://github.com/Minecraft-3DS-Community/CombinedAudioTool