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i'll just copy this over from another one of my posts;
I have found the solution. first, put both Sengoku.exe and SengokuGame.exe into Windows XP (Service pack 2) Compatibility mode. then restart your computer. after the restart, run Sengoku.exe from the sengoku folder. make sure it is updated, then click play. it works fine.

if that failed to work, update ALL of the neccesary programs for sengoku (.NET, virtual C++, etc.) then try again.
 
I found solution: You need some special audio-codecs which the game is using.

http://shark007.net/forum/Thread-Setup-and-usage

In fat black letters "Here are the download links .. blabla"
First the 32bit version, the 64bit version after. both have a size of 20-22mb.
But take care ! The installer is trying to install some "extra" programs. ;-)
Like a new search-bar for your browser or other silly stuff (smiles for chat programs for example).

source:https://steamcommunity.com/app/25890/discussions/0/648812917452688036/ posts hignhz
 
Has anyone found a solution to this problem? I feel actually a bit betrayed that I bought this game over steam and can't get it running on a quite usual setup.