Regarding this:
Hifiberry have changed the specifications for DAC+ADC. At first, they told that there was an onboard Balanced Input connector, but very recently they changed the DataSheet. Although, AFAIK, they have not officially communicated the problem, i know that there is a problem with this model and the supposed “Balanced Input” works like a simple “Unbalanced Input”.
The best you (and everybody having Zynthians with Hifiberry DAC+ADC) can do is to modify the wiring, following the new specifications from Hifiberry, so you can turn the current Mono “fake-balanced” Jack input into a more functional Stereo Jack input.
Of course, if you are really angry and want the Balanced Input, you could reclaim to HIfiBerry, and they, could consider replacing your board by a new “DAC+ADC Pro” that really have a true Balanced Input.
Sorry for the inconveniences. I have to add notes in the blog and shop explaining all this, but as i told you, it was very recently that i know about it and had no time to do it.
FYI, all the kits we are selling currently include the new DAC+ADC Pro, but we’ve not changed the documentation/descriptions yet. It should be done in the next hours/days.
Thanks