Yes, the Rotel does support ASIO and the driver ís installed.

The same happens with all sampling rates. PS. The 352,8 and 386 KHz are supported and shown on the display of the amplifier. Also DSD is possible which is also not mentioned in the description at their site. This driver is compatible with more models so I guess that's why they state 192KHz as a max.

Still it does happen at other sampling rates and in ASIO, Wasapi and Directsound.

I have tried a tool called "Spdif-KA". Which does work around the problem but I don't feel that is the right way to do it.

The music plays fine when there is a signal, but only when pressed STOP, after a few seconds the signal is cut. In pause it does not cut the signal.

Just had it running perfectly quite some time now. The I switched off the amplifier (thus the USB device disappears from the computer. Turn the amplifier back on, the problem arises again.
Then I reboot the computer, problem still there. Then turn of the amp, reboot the computer and as soon as the screen turn black I switch on the amp. Same problem.

Then I turn off the amp and the computer completely. Turn on the amp and after that the PC, just like when I did when it ran good, the problem is still there.

It almost looks like "something" changed somewhere in the computer or wherever that triggers this and for some reasons after some time it turns back to normal again, but I have no clue how and why. I I just know where this came from or what triggers this would help me a lot.

Also, this does even happen with the standard Windows sound test. It's not a foobar issue.