For DVD-A to work, you can ONLY use the 5.1 analog out of the player. You will not get DVD-A singal via a digital connection, unles you are playing a PCM track or non-DVD-a material. Most players I've seen also have digital out to pass the bitsream for other material (normal CDs, DVDs...
You should have no problem sending the signal. If your receiver does not have DTS ES capability, it will most likely automatically downmix and play it in 5.1
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All progress is based upon a universal, innate desire on the part of every organism,
to live beyond it's income...