Optical cable goes straight from Humax box to AMP and don’t get any sound. If I unplug it from the Humax, you can see the little red light shining out, and if I try the same cable from DVD player (to AMP), it works fine. I’ve tried changing the audio from multi-channel to stereo to see if that did anything but no dice. Pretty sure I’ve had it working before but not 100% sure. Will probably try a reboot soon as its not recording anything, but is there something else I’m missing?.