I use the optical out on my new Mac Mini to play high quality music over a separate D/A converter and a class A amplifier. This worked fine with the previous Mac Mini revision.
Now, when I connect the most recent mac Mini with HDMI to a TV set (for watching movies) and at the same time connect optical out for music, the music channel is dead. The read line on the optical cable is on, but the D/A does not receive any signal?
The selection in the system preferences for Audio can be toggled between HDMI and optical out, but does not give any result.
The only option I now have is to use the headphone out with an analog signal into my amplifier, but with a loss of quality.