SBT & analog outs | No sound

Guys,
I need your thoughts on the following:

Wanted to connect my trusty SBT to an external Tivoli Audio Radio which has an Aux-in port.
Hence I connected both via RCA to 3,5mm cable and set up the Touch (WiFi, Analog & Digital output).

Touch was still pointed to my NAS (I used the SBT a while back in my living room system connected to an external USB Dac) so I could choose some music but after the songs started to play, no sound of all coming out of the Tivoli.

I checked the Tivoli with a DAP connected via a 3,5 to 3,5mm cable and sound was there.

So is there anything that I need to set in the Touch what I have missed so far? Don't hope there is an issue with the analog out of the SBT?

Thanks in advance.
Cheers,
Markus