"When all else fails, consult the manual" -words of wisdom.
I'm using a glass fiber Toslink and should fall under the "higher quality" category. OTOH, it is three meters long.
I'll wait for a rainy day (long wait in 'Vegas) and experiment with shorter Toslink cable, RCA, etc.
I'd sure feel cheated if I can't get this to work.
Thanks for your responses.