DSD (DoP) -> output format on SPDIF (Volumio Primo)

Hi all,

I’m trying to output DSD (Using DoP) and have no sound output on SPDIF output.
The only way I get to play DSD files (using DoP) is with the “Audio Resampling” option activated.
I didn’t want that, because I wish to get “bit perfect” on all my PCM files.
I connect the Primo to my Lyngdorf TDAi2200 via SPDIF. I wanted to get bitperfect on PCM because the AMP is, in fact, a digital amplifier, that is, when I input digital format on SPDIF it never gets really converted to analogue. It somehow attacks the digital power amp in digital way.

Thanks in advance.
Paulo Nunes