Ok ..so this type of question will have been inevitably have been answered before but bear with me please but ....will I only be able to access Dolby Tru HD sound from my blu ray discs on my newly purchased Sony BDP S185 via an HDMI lead to my Onkyo 875 receiver? (and not via it's co-axial optical output?) ..and if HD sound is available only via HDMI how do I manage with only one HDMI output on the Sony given that connects to my Pioneer Plasma? (I don't wish to have everything linked up via the receiver) .........?