Dutch & Dutch 8c with multiple sources

That's why I said you might need to use a preamp or DAC with multiple inputs and use analog output to the speakers. The way I did it was setup my server on the network and used a Lumin U1 mini to stream from my ripped files and Quboz to the speakers. 

I sold the D&D 8c but I always used all digital AES3 to the speakers but for what you want you'll need a preamp or DAC with multiple inputs.  

I would get something like this and use the analog in on the speakers. 

https://www.bhphotovideo.com/c/product/1618329-REG/cambridge_audio_c11217_dacmagic_200m_dac.html

Is your connection from the TV , Toslink, SPDIF , HDMI or analog ?  You could email Dutch and Dutch  explain what you're trying to do. They were always considerate and helpful. 

Don't confuse price with quality in DACs. I just used an example there are a lot of DACs that can be used as a preamp. Maybe this link will help.

https://pura-audio.nl/en/2020/10/13/elementor-4383/