Hachette (Green version)

Program usage

Show general command overview

$ audiocube.py hachette_green -h
usage: audiocube.py hachette_green [-h] {encrypt,decrypt,create_nfc_file} ...

Toolbox for "Hachette (Green version)"

positional arguments:
  {encrypt,decrypt,create_nfc_file}
                        The command to execute

optional arguments:
  -h, --help            show this help message and exit

Encrypt/Convert .mp3 files to .smp

To encrypt/convert .mp3 file(s) to the .smp format, use the encrypt command:

$ audiocube.py hachette_green encrypt -h
usage: audiocube.py hachette_green encrypt [-h] [--output_file_pattern OUTPUT_FILE_PATTERN] input_file [input_file ...]

Encrypt audio file(s)

positional arguments:
  input_file            The input file(s) to read from

optional arguments:
  -h, --help            show this help message and exit
  --output_file_pattern OUTPUT_FILE_PATTERN, -ofp OUTPUT_FILE_PATTERN
                        Pattern for the output filenames (default: {name}.smp)

For example, to encrypt/convert files T0010.mp3 and T0011.mp3 to T0010.smp and T0011.smp:

$ audiocube.py hachette_green encrypt T0010.mp3 T0011.mp3
"T0010.mp3" -> "T0010.smp"
"T0011.mp3" -> "T0011.smp"

Decrypt/Convert .smp files to .mp3

To decrypt/convert .smp file(s) to the .smp format, use the decrypt command:

$ audiocube.py hachette_green decrypt -h
usage: audiocube.py hachette_green decrypt [-h] [--output_file_pattern OUTPUT_FILE_PATTERN] input_file [input_file ...]

Decrypt audio file(s)

positional arguments:
  input_file            The input file(s) to read from

optional arguments:
  -h, --help            show this help message and exit
  --output_file_pattern OUTPUT_FILE_PATTERN, -ofp OUTPUT_FILE_PATTERN
                        Pattern for the output filenames (default: {name}.mp3)

For example, to decrypt/convert files T0010.smp and T0011.smp to T0010.mp3 and T0011.mp3:

$ audiocube.py hachette_green decrypt T0010.smp T0011.smp
"T0010.smp" -> "T0010.mp3"
"T0011.smp" -> "T0011.mp3"

Create a compatible NFC tag

Step 1: Create a .mct file

The docs/devices/hachette_green/nfc directory contains ready-to-use .mct files that should be sufficient if you just want to create a backup NFC tag for an existing figure, in which case you can skip this step. If however you want to create your own fairytales, you should follow this section to create your own custom NFC tag for this fairytale.

To create a compatible NFC tag, start by using the create_nfc_file command:

$ audiocube.py hachette_green create_nfc_file -h
usage: audiocube.py hachette_green create_nfc_file [-h] file_id [name]

Create a NFC tag content file, in order to create a compatible ("Mifare Classic") NFC tag via the "MIFARE Classic Tool" (https://play.google.com/store/apps/details?id=de.syss.MifareClassicTool) smartphone
app

positional arguments:
  file_id     The file ID, a hexadecimal string in range 0000...FFFF
  name        The name/label for this NFC tag. Determines the output file name. Optional, defaults to "TMB-ABC_T{file_id}" (default: None)

optional arguments:
  -h, --help  show this help message and exit

For example, to create a NFC tag that will play audio file T0023.smp in directory TMB-ABC:

$ audiocube.py hachette_green create_nfc_file 0023

The above command will create a file called TMB-ABC_T0023.mct.

Step 2: Write the .mct file to a Mifare Classic NFC tag

In order to actually create the NFC tag from the .mct file created in step 1, you need to perform the following steps afterwards:

Install the free and open source “MIFARE Classic Tool” smartphone app, if you haven’t done so yet
Copy the .mct file created in step 1 to directory /sdcard/MifareClassicTool/dump-files/ on your Android smartphone
Open the “MIFARE Classic Tool” app
Click “Write Tag”
Click “Write Dump (Clone)”, then “Select Dump”
Choose the .mct file that you created in step 1, then click “Select Dump”
Hold the “Mifare Classic” NFC tag that you want to write to the location of the NFC reader on the back of your smartphone. You should here a tone and a “New Tag found (UID:xxxxxxxx)” message should be displayed
Keep the NFC tag in this position, click “OK”, then “Start mapping and write dump”

Files

Filesystem

ToDo

MP3 File format

The device doesn’t seem to be very picky about the MP3 files. The files on the german version are encoded at 48kHz Stereo @ 320kbit.

Encryption

The MP3 files the device plays are encrypted with a simple algorithm:

The whole file is then XORed with the byte array [0x18, 0x08, 0x20, 0x20]

NFC Tags

The device uses Mifare Classic 1k NFC tags.

Photos

Credits

“Cean D.” provided information about the device, the figures and the NFC tags “Nikolas M.” provided a nice photo of the device and information about the device