I can indeed confirm that both of the provided DTS-HD and TrueHD files work with aplay for me, with the following system combination:
- Graphics: NVIDIA GPU NVS 3100M (GT218)
- Driver version: 260.19.21
- Kernel version: 2.6.36
- Receiver: Onkyo TX-SR607
- Both of the files work
Yes, this is not actually older hardware like Carl Eugen said.
I can also confirm that 256.35 works, and nouveau works with experimental patches
With an older NVIDIA GPU GeForce 9400 (C79), the files do not work with any driver.