[Elanoir]

If you use units like Squeezebox touch, and you connect your high-end DAC with it via the optical spdif, will the squeezeboxs' soundcard ruin the DAC capabilities of bringing the amplifier good sound signal, like it would if you connected it (the DAC) to say; a PC via USB?
 
I'm sorry but I'm really bad at explaining things, especially not with my native language. Please answer if you get the question. Thanks in advance.

 

[khaos974]

It depends on whether you trust your DAC's jitter rejection abilities.
In my opinion, a competent DAC should be able to do so.