Short answer, PCM fixed it. But I still don't understand why. I would think audiophile or PCM the player still has to read the same bitstream track and either send it to the receiver or decode it then send it to the receiver. I have been searching the onkyo 607 receiver forum trying to confirm my issue thinking it had to be the receiver decoding. This has been an issue with other onkyos. But as long as this fixes it that is fine, I can't make sense of everything.
Audiophile- player sends the DTS-HD audio to your receiver. Your receiver then has to do the decoding.
It's a problem with the 1600, NOT your receiver. The 1600 is having issues sending the DTS-HD track to your receiver. Not sure why, but it is what it is. Hopefully, with all these reports, Samsung is working on a fix.