Hello guys, this is my first post here! I just got a MIG Switch card out of curiosity and I was tinkering with it. For those who don't know, it's used by placing XCI dumps as well as other game specific bin files in the sd card of the MIG Switch, and are obtained from the original cartridge by using an app like nxdumptool. Two of these bin files are mandatory to get the game to boot: Initial Data.bin and Certificate.bin. They stay the same for every cartridge of a specific game. Now, if you want to use an XCI dump from a shady website it's impossible to get it to work without those files. By using the Certificate.bin from another game it has no problem, but this does not count for the Initial Data.bin. So I looked for a way to obtain this Initial Data from an XCI file and read a bit of the XCI file documentation from switchbrew dot org. Here's what I understood so far: The Switch checks if the cartridge is valid by doing a challenge–response authentication on the Initial Data. The Package ID is contained both on the XCI and the Initial Data, on positions 0x110 and 0x0 respectively. The Initial Data hash is on the XCI at position 0x160. It is calculated by doing a SHA-256 hash on the full Initial Data content. So I was wondering, is there a way to to construct a functional Initial Data file starting from an XCI dump? I also tried a reverse approach by editing the Package ID in the Initial Data from another game, generating the Initial Data hash and putting it in the XCI file but is not enough to get the Switch believe it's a real game. Sorry if this may seem stupid but let me know what you think.

Tutorial Updated

How to extract Pokémon Let's Go and Sword and Shield audio .wem files

Hi! It is stupid that I didn't see Kaphotics tweet in 2018, but I was wondering how to rip the audio files and thanks to KillzGaming and LoneEevee I was able to rip them all.

What do you need:

- Pokémon Lets Go Eevee/Pikachu/Sword/Shield decrypted
- Foobar2000: https://www.foobar2000.org/
- VGStream component for Foobar: Download

Step 1: Prepare your game.

- Get the desired game (In this case Pokémon Sword)
- Decrypt the game with your favourite method.
I recommend taking a look to these tutorials if you don't know how to do it: https://gbatemp.net/threads/decrypt...backup-loading-ryujinx-yuzu-in-1-click.506954 or https://gbatemp.net/threads/extract-nsp-nca-xci-update-all-in-one-tool-for-layeredfs.511156/
- Place all files anywhere in your PC.

Step 2: Foobar setup

- Download and install Foobar 2000 and VGStream component.
- Open it
- Go to File > Preferences > Components > Install
- Look for the VGStream component you downloaded
- Restart Foobar

Step 3: Extract the .wav from .wem

- File > Open > look for the .wem you want to extract
- You can preview it using the top toolbar

- Select the track you want to extract
- Right click > Convert > Wav
- Save the .wav

And that's all!

If you want MP3, you will need LAME encoder.

Some tracks are separated intro and loop, so you will need to join them in Audacity or your favourite audio editor.

Last edited by Manurocker95, Mar 17, 2021