The music for the game has been originally composed by the Ymir Entertainment Co., Ltd. developers. However, since there are many versions of the game released through the world, it's possible that the original music has been replaced to reflect the region where the game is released, but the original composers are from the Ymir Entertainment Co., Ltd.
From what it seems, there is a connection problem caused either by your network connection or by Metin2 servers. If the Metin2 servers are temporarily down, you will need to wait for a while. If the problem is caused by your network connection, go to Control Panel > Network and Internet > Network and Sharing Center > Local Area Connection and press Disable. After that, reboot your computer and go again to Control Panel > Network and Internet > Network Connections, right-click the Local Area Connection and select Enable. In addition, open your browser, press Ctrl + Shift + Delete key combination and clear all cache, cookies and temporary Internet files. If the problem persists, uninstall the game and download and install the updated version of the client. When you launch the game, make sure that all unnecessary programs that may use your Internet bandwidth are closed.
The music for the game has been originally composed by the Ymir Entertainment Co., Ltd. developers. However, since there are many versions of the game released through the world, it's possible that the original music has been replaced to reflect the region where the game is released, but the original composers are from the Ymir Entertainment Co., Ltd.
There isn't an official way to unpack these files. You need to use a 3rd party application. A Google search will come in need for this case.
From what it seems, there is a connection problem caused either by your network connection or by Metin2 servers. If the Metin2 servers are temporarily down, you will need to wait for a while. If the problem is caused by your network connection, go to Control Panel > Network and Internet > Network and Sharing Center > Local Area Connection and press Disable. After that, reboot your computer and go again to Control Panel > Network and Internet > Network Connections, right-click the Local Area Connection and select Enable. In addition, open your browser, press Ctrl + Shift + Delete key combination and clear all cache, cookies and temporary Internet files. If the problem persists, uninstall the game and download and install the updated version of the client. When you launch the game, make sure that all unnecessary programs that may use your Internet bandwidth are closed.