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What is nxaudiotool?

miixuwa/nxaudiotool — explained in plain English

Analysis updated 2026-05-18

1PythonAudience · generalComplexity · 2/5LicenseSetup · easy

In one sentence

A Windows desktop app for previewing, organizing, and converting Nintendo Switch game audio formats into standard MP3 or WAV files.

Mindmap

mindmap
  root((repo))
    What it does
      Reads Switch audio
      Converts to MP3 WAV
      Batch processes files
    Tech stack
      Python
      CustomTkinter
      FFmpeg
      vgmstream
    Use cases
      Convert game audio
      Preview collection
      Batch conversion
    Audience
      Fans
      Hobbyist modders

Code map

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filefunction / class

What do people build with it?

USE CASE 1

Convert Nintendo Switch proprietary audio files into MP3 or WAV for use in other software.

USE CASE 2

Preview and search a personal collection of game audio files.

USE CASE 3

Batch-convert an entire folder of Switch audio files at once.

What is it built with?

PythonCustomTkinterpygameFFmpegvgmstream

How does it compare?

miixuwa/nxaudiotoola-bissell/unleash-liteabhiinnovates/whatsapp-hr-assistant
Stars111
LanguagePythonPythonPython
Setup difficultyeasyhardhard
Complexity2/54/53/5
Audiencegeneralresearcherdeveloper

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · easy Time to first run · 5min

A pre-built Windows executable is provided, so no Python installation is required.

You can use and modify the code, but any distributed derivative work must also be open sourced under the same GPL license.

So what is it?

NXAudioTool is a Python desktop application for previewing, organising, and converting audio files from Nintendo Switch games. It provides a lightweight graphical interface for working with the proprietary audio formats that Nintendo games use, formats that standard media players cannot open. The tool reads six input formats common in Nintendo Switch titles, BFSTM, BFWAV, BFSAR, BFBNK, BFSEQ, and BWAV, and converts them to the standard MP3 or WAV formats. You can play files directly within the app, browse and search a collection, drag and drop files in, control volume and playback, set it to auto-advance to the next track, and run multi-file batch conversions. Two third-party tools handle the heavy lifting: vgmstream decodes the Nintendo audio formats, and FFmpeg handles audio conversion and encoding. The graphical interface is built with CustomTkinter, a modern-looking Python UI library, while pygame manages audio playback. A pre-built Windows executable is available in the repository, so users do not need to install Python or build anything themselves, just unzip and run. The project is described as an unofficial fan-made utility with no affiliation with Nintendo, and the creator states it was built using publicly available tools without any reverse-engineering. It is released under the GNU GPL 3.0 licence.

Copy-paste prompts

Prompt 1
Help me run the pre-built Windows executable for NXAudioTool without installing Python.
Prompt 2
Explain what each of the six Nintendo Switch audio formats this tool supports is used for.
Prompt 3
Show me how to set up a batch conversion of a folder of BFSTM files to MP3.
Prompt 4
Walk me through how vgmstream and FFmpeg work together inside this tool.

Frequently asked questions

What is nxaudiotool?

A Windows desktop app for previewing, organizing, and converting Nintendo Switch game audio formats into standard MP3 or WAV files.

What language is nxaudiotool written in?

Mainly Python. The stack also includes Python, CustomTkinter, pygame.

What license does nxaudiotool use?

You can use and modify the code, but any distributed derivative work must also be open sourced under the same GPL license.

How hard is nxaudiotool to set up?

Setup difficulty is rated easy, with roughly 5min to a first successful run.

Who is nxaudiotool for?

Mainly general.

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