Sdmc Sound Cards & Media Devices Driver


The package provides the installation files for C-Media USB Audio Device Driver version If the driver is already installed on your system, updating (overwrite-installing) may fix various issues, add new functions, or just upgrade to the available version.

Sound cards 7.1

The 3DS uses an SD Card for general storage of game data, music, photos and videos taken with the 3DS.

  • Everything stored under sdmc/Nintendo 3DS/<ID0>/<ID1> is encrypted by 128 bit AES-CTR with console-unique keyslots. The keyslot is initialized by nand/private/movable.sed.
  • The crypto IV/CTR for each file is generated as follows: take the UTF-16 path relative to sdmc/Nintendo 3DS/<ID0>/<ID1> (the path it self begins with '/') and hash it with SHA-256, including the null null-terminator. Then calculate CTR as CTRbyte[i] = Hashbyte[i] ^ Hashbyte[16+i] for i = 0 to 15.
  • The base CTR is fixed for each file, therefore the CTR never changes after each write. Thus it is possible to obtain some cleartext by XORing one file(like newly created extdata) with a newer file, where the newer file overwrote zeros in the original file with non-zero data.
  • Files stored under nand/data/<ID0> also use the same keyslot, but it is only used for MACs.
  • ID0 is the first 0x10-bytes from a SHA256 hash.
  • ID1 is the scrambled SD card CID from the SD card which this directory was originally created on. To generate this directory name from the original CID, first the CID is rotated 8-bits to the left. Then, each u16 is moved as described in the below table:
Input rotated CID u16 indexOutput CID u16 index
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DCIM - Photos and Videos taken by the Nintendo 3DS Camera application are stored in this directory. Internet Browser image downloads are stored here too.

Note: Playing/Recording (3D) Videos was introduced with update 3.0.0-5. The 3D videos are in .avi format and the video frames use MJPG.

backups - This directory contains SD Title Savedata backups. For more info, see SD Savedata Backups.

Sdmc Sound Cards & Media Devices Drivers

dbs - This contains database files relating to the titles installed on the SD Card. These files are encrypted. For more info, see Title Database

title - Title data for titles installed to the SD Card are found here. All data in this directory is encrypted with a console-unique keyslot. For a list of SD Card titles see the Title list. For more info on the title data structure see Title Data Structure.

Nintendo DSiWare - DSiWare titles are exported here.


'Private' data is stored here as cleartext:

Under the camera private dir is phtcache.bin.When you want to install and see pictures with 3DS, rename to 8 numbers.mpo and save it on /DCIM.Under the sound private dir is: voice/XX/*.m4a. Where XX is 01-10, with sound saved as .m4a.

Other Private Data[edit]


There is also a directory called 'private' on the root of the SD card that contains data, in which would otherwise be completely different from what the Nintendo 3DS normally uses, but known to the application itself.

Sdmc Sound Cards & Media Devices Driver

Some apps, such as Flipnote Studio 3D create a directory called 'private' on the root of the SD Card, it contains a Nintendo 3DS directory inside it. Inside the app directory contains a directory with the game code of the application (eg. 'JKZP' for Flipnote Studio 3D), then its corresponding data, as shown here:

Sdmc Sound Cards & Media Devices Driver

In this case of Flipnote Studio 3D, there are multiple files with an ID, then ending with the .kwz extension. There is also a !!.lst file as well.

Sdmc Sound Cards Online

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