Very Weird Kemper profiler SPDIF with RME UFX+ AES/EBU Connect....

As you all know

Kemper Profiler supports SPDIF input and output of the same type as RCA terminal, and UFX+ supports AES/EBU.

So I connected it with an impedance converter.

The strange thing is that when I connect from Kemper Profiler spdif out to ufx+ AES/EBU IN, the sound is

only good.

If you connect Kemper Profiler spdif IN from ufx+ AES/EBU OUT, you can't hear it.

In other words, when only the Kemper Profiler digital out and ufx+ digital in are connected, it can record normally and hear sound.

I know that SPDIF has to connect both in and out, but what is the problem??

https://www.thomann.de/intl/pr…aes_ebu_spdif_cable_3.htm
https://www.thomann.de/intl/pr…bu_spdif_cable_male_3.htm

One piece of each here, perfectly works.

In the MADIface Series Settings, switch the AES Format to "Consumer".

Check Input Source. If set to S/PDIF Reamp, it will switch to S/PDIF Input as soon as it is receiving a time code. If you don't connect that cable, no time code is received and it defaults back to Front INPUT regardless of the Input Source setting.

And what was the soution?