Glad it worked. I went with a jumper because I like to minimize permanent modifications to the player as much as possible. Even if I unsoldered the connection it would still show, hence the jumper.

Yeah but you soldered to other parts of the board that will show so what's the difference. I also didn't have a suitable jumper to use.

Did you test the center output?

Yes it works fine - easy to test since it's simply the other channel of the DAC. A little hard to tell how "centred" it is though.

You put no circuitry of any kind between the output pins and the stereo?

The only circuitry I have after the DAC is the RC network on page 10 of the CS4334 datasheet. They are after all line level outputs. I believe this CS4334 is designed to be used like this without any further major circuitry after the DAC. The eval board even has outputs like this although it does have another circuit with an active output stage