Dear Ron,
Thanks for your reply,
and tell me about sound system with showing the picture.
My computer is win8, so as you said, sound property screen is a little bit different.
I tried to check my audio device and drivers.
But in my PC, I don't have 7.1ch sound device.
Unfortunetry, audio device is 2ch. (The device driver is the latest.)
Is it difficult to play the wav of RC4?
Thanks,
pecopon