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Thread Starter 

A few days ago I used PC --> Nuforce icon HDP via optical --> Senn HD 650 to watched a Blu ray movie for a while and had no problem.

 

Today I trid to play a few movies, evey one gave me mono tone consistent noise and I heard no movie sounds. I could play music CD and music file on hard drive without problem.

 

SO I switched to use USB cable connection and now I could hear movie sound and no noise.

 

I could not remember what's the difference between a few days ago and today when I played the same Blu ray  disk.

 

So why do I hear the noise but no movie sound?