spdif

I've connected an optical SPDIF cable from Soundblaster Audigy to the optical port of the Yamaha RX-V377 receiver. I've setup the audio settings or so I think correctly in Potplayer to play 5.1 sound and I downloaded a test 5.1 AAC mp4 file. I get correct sound from front left, right and centre...

In short, my use case: in my home office, I have a pair of Dali Zensor AX 1, connected to a high-end PC through SPDIF/TosLink. Here I'm listening to music exclusively from my PC (Tidal HiFi/master and CD). Situation: My SoundBlaster Z's SPDIF out died; I want something better than the...