Yes, both outputs work at the same time.
svj81505 wrote:With the X1 system do the HDMI and Optical audio outputs have the ability to work at the same time? I have a TV that doesn’t have an optical audio out, nor a L/R composite output, so it’s not compatible with most decent sound bars on the market, it would only work using an aux 3.5mm headphone cable. So my plan if possible is to use the HDMI cable to the TV and the optical output for audio to whatever sound bar I end up getting if it’s possible. I tried calling Comcast support to see about getting an answer but the tech rep just kept repeating that the HDMI port could do both which I already know it can.