Anyone have any idea about spp file extension?

Discussion in 'NDS - ROM Hacking and Translations' started by kyon92, Mar 6, 2010.

Mar 6, 2010
  1. kyon92

    Newcomer kyon92 Newbie

    Mar 6, 2010
    United States
    Hi, I'm tryin to extract voice data from nds rom.

    The game is called "Love Plus"


    I extracted the rom and found the sound files.

    Usually there's only .sdat file but this one has two other

    Siren14Voice.spp (158,887KB) and Siren14Voice.vtb (200KB)

    I successfully unpacked the .sdat file but there was only bgm and sound effects (no voice)

    I'm guessing Siren14Voice.spp is the one i'm looking for but I have no idea how to unpack this thing

    I googled it and couldn't find any info. about .spp extension

    Can anyone help me with this?

  2. tmpuser444

    Newcomer tmpuser444 Newbie

    May 2, 2014
    siren14voice.spp is a contains huge number of voice files.
    siren14voice.vtb is an little endian index file.
    a data array in the file.
    c++ signature:
    // 8 bytes alignment
    struct vtbfile
    vtbdata[] Data;
    struct vtbdata
    u32 Offset; //This value >> 4 Is the Offset of a single voicefile in .spp
    u32 FileLength; //Length of that file
    Visual Basic .net signature:
    Structure vtbfile
    Dim Data As vtbdata()
    Structure vtbdata
    Dim location As Integer
    Dim voiceSize As Integer
    Function Getlocation() As Integer
    Return location>>4
    End Function
    End Structure
    End Structure

    Knowing these ,split the spp file into single files is not difficult.
    But voice files are encrypted.
    Decryption is not a simple work.
    To decrypt voice files,you should learn reverse engineering well.
    GHANMI likes this.

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