DD to SPDIF with Samsung LE40B750

[snicoll]

Here is my setup: pi > Samsung LE40B750 using HDMI and the TV is connected to my DD/DTS capable AVR through optical out (my receiver does not support HDMI).

I have a DVD that is connected with the same setup (DVD > TV) and I can play DD and DTS movies without any issue (so the audio passthrough is working as expected).

However on the pi I only get PCM output. I tried to switch the audio output in the system config from 7.0 to 5.1 but still no luck.

Does anybody know what I could try?

Thanks !