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Voice/SFX Modding Guide

A Tutorial for Super Smash Bros. Ultimate

Updates

Update 2 11d
  • - Some requirements and assumptions are now updated for clarity and for beginners
Update 20d

1. Introduction

This tutorial is a guide on creating voice and general sound effect mods for Smash Ultimate.

1.1. Some Notes Before Starting

This tutorial assumes you have an exploitable Switch and are capable of modding the game. 

Please do not release unfinished work as a full mod. If you need help with following this guide, the recommended option is to ask in the Smash Ultimate Modding Hub Discord (link is on the front page of the Ultimate section here), but making a help thread also works.

Credit any content you may have used for your mods when releasing or showcasing. Taking credit for content you did not create from scratch isn't cool or permitted.

2. Requirements


3. Setting Everything Up

The most crucial thing you need is access to a tool that can export wavs, mp3s, or oggs such as Audacity, along with the sound clips to edit for Smash. This guide will specifically go over how to use Audacity to export custom sound clips. If you don't know how to work Audacity, there are many guides online on the various things you can do with its editor.



For the most part, you'll just need to adjust volume and trim down your clips. You should usually just be using the Normalize function (Effect > Normalize) set to 0db to get the loudest parts as loud as they can be without the audio distorting. 

Refer to this for making Music mods.

4. Importing Your Audio And Compression

Make sure you have the nus3audio editor downloaded for later. Assuming you're using Audacity, import the audio file with CTRL-SHIFT-I from wherever you've downloaded your sound file (E.G sounds-resource, youtube, etc) and trim it down to what you want it to be. Export your sound clips individually as WAV/MP3/OGG.

5. Injecting Into a nus3audio File

Now, you want to inject into a nus3audio of your choice. You'll need to dump your game with UMM or nxdumptool to extract the sounds you want to edit first. Fighter specific sound effects are in root > sound > bank > fighter, while fighter voices are in root > sound > bank > fighter_voice. Find the nus3audio and load it up into the NUS3Audio Editor with the bottom left button.



You'll see each individual sound to replace. Choose one and hit "Replace" and give it the proper audio clip of your choice.



The preview button will play a preview of the sound you're replacing. You can also export it and convert it to an audio file type Audacity supports if you'd like by using Coolsonickirby's website.



Once you're done replacing your clips, choose the "Save" button and export the nus3audio file. This will save the entire game-ready nus3audio, but the Export button is for exporting individual sound clips.

6. Exporting

You should now have your nus3audio file(s) that are ready for ARCropolis (or Ultimate Mod Manager if they fall under file size limits.) Just make sure to give them the proper paths.

7. Conclusion

Well, that about wraps up this guide. If you have any questions that can't be answered by the Modding Hub, leave a comment with detail so I can understand your issue.
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  • The VGAudio Conversion pack's link is broken, but here is a link to a GitHub with the conversion pack files(I think)!

    https://github.com/slashiee/StreamTool
    It's Show Time!
    URL to post:
  • Dubb D avatar
    Dubb D Joined 5y ago
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    8mo
    The VGAudio Conversion pack's link is broken
    --Temet Nosce--
    URL to post:
  • trolldier123 avatar
    trolldier123 Joined 5y ago
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    11mo
    The link for the conversion pack is broken.
    Hey man, Pit's good
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  • BananaSlayer avatar
    BananaSlayer Joined 2y ago
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    When I run the command to extract all the idsps, it gives me this: "Assertion failed: !memcmp(nus3Header, "NUS3", 4), file source/nus3audio.c, line 153"
    Any idea what that's about?
    what's poppinggggguh
    URL to post:
  • Prawnsacrifice avatar
    Prawnsacrifice Joined 2y ago
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    i too am very interested in converting music for battles
    URL to post:
  • Homobound avatar
    Homobound Joined 2y ago
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    Okay so, I was trying to follow this tutorial but instead of doing it for a voice mod I ended up trying to do it for music. I wanted to replace the menu theme and I ended up getting everything right with the correct file, offset, and good file size. However, I messed up somewhere in between with the conversion maybe? Do you have any advice on what to do different for music replacing?
    URL to post:

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kalomaze
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made guide
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jam1garner
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author of nus3audio-rs
Helicoprion
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NUS3Audio gui editor author
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making the tools needed for conversion of audio to idsp and etc
ThatNintendoNerd
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parts of this were originally re-written by him

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kalomaze
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