This file is the backbone of the game's audio experience, managing:
: Place the file in the download folder within your main PES 2017 installation directory (e.g., C:\Program Files (x86)\Steam\steamapps\common\Pro Evolution Soccer 2017\download ).
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Inside the main game directory, you will see dozens of .cpk files (e.g., dt00_e.cpk , dt10.cpk , dt20.cpk , etc.).