Audio (sound) in all n3v games

As could be seen I have TRS2004, TRS2006, TRS2010, Trainz A New Era SP2 and TMR17.

Suddenly to day I have lost the audio (sound) in the n3V games - TANE and TMR17 while I have the audio in other games as well as in other programs of 0f my PC.

How to solve this ? I will be grateful if I am guided in this case.

Thanks.

See my post in your other thread.