Question Sky Q: PCM Stereo over HDMI, Dolby Digital over Optical at the same time?

I'm a Home Automation programmer who is doing some work on a multi-room video system put together by another dealer. The customer is looking to add a couple of Sky Q boxes, but due to the way the system has been put together, this is only feasible if the box is able to output PCM stereo over HDMI and Dolby Digital over optical at the same time.

Is this possible?

Thanks.

 

I believe they are both independently selectable within the Q box sound settings.

 

????? Unless they are minis.