Morrowind in Windows 7
 

If the game frame rate is choppy and you encounter persistent slowdowns in Windows 7, this may be due to an incompatibility between the game and the system audio codecs. This can also result in music not playing in-game. Installing an alternative set of audio codecs (recommended: LAV Filters, found here) may resolve this issue.

Tested on a AMD FX-8350/GeForce GTX 760/Windows 7 32-bit.

Please provide feedback.

Thanks for the tip! Will try it!