@duffer5
My Finisar Aoc cable arrived today.
I first listened to the I2S input and then switched to the Fmc boxes with the first noname optical cable.
And it was generally bright in the sound.
The voice of Simply Red was clearly more forward. (At first I thought you don't know that, it will fit).
But with the Finisar Aoc cable, my first impression was that it was clearly darker (but not negatively, quite the opposite).
And Simply Red's voice is clearly more placed and correctly presented.
Vocally it is also much more pleasant and accurate.
And the rest of the bass, slam mids, treble separation, timing, detail, homogeneity are much much better.
I'm biting myself right now because I have to go to bed soon because of work.
The Finisar cable is really good and worth the wait.
And not comparable to the optical cable that Amazon offers.
It's two worlds in different ways.
Thanks again for this good tip with the cable and your help with the selection of the boxes.
It was definitely worth the effort, even if I have to listen to it for a while longer.