In Visual Studio C# : How to play 2 wav file at certain dB values simultaneously

Question

I am trying to build an application in c# visual studio, in which I want to play 2 wav files at certain dB values simultaneously. I looked into many stackoverflow questions but didn't find any useful answers.

My scenario is : before using the application user fill the 2 different dB values for 2 wav files. So I am facing two problems -

1. I am not able to figure out how to play two wav files on ceratin dB values?
2. How can I validate that the wav file is being played on the dB value, I provided.

I tried using the WaveChannel32, mediaplayer and Naudio but it didn't help.

Any help will be much appreciated.

Thanks, Robin