
As I said everything works correctly, i.e. This didn't make any difference to my problem. PS: I installed today the latest UAD drivers for the realtek audio, version 6. I have search the Internet extensively and haven't found any similar problem posted. If I closed the player and restart the movie, the mono is back to upscaled stereo with no audio in the center speaker and I have to do the same workaround to make it output from the center speaker again. It remains like that as long as the movie plays.

Once the movie has started, I switch the output using the speaker icon in the windows notification area from "speakers" to "digital output" which is not used so the sound cuts, then immediately back again to "speakers" and now the mono audio comes out of the center speaker as it should and both the left and right are silent. I have found a workaround however but it's annoying having to do this each time. But when I play a movie with a mono soundtrack, the sound is always upscaled to stereo and comes from both left and right speakers, with no sound from the center speaker.

I get sounds from each speakers when I do tests in windows, and I get stereo and 5.1 audio perfectly. I have a Asus z370 motherboard with a Realtek HD Audio ALC1220.
