I thought more and came back to say that you might have considered the following setup:

Employers laptop -> (if newer laptop with no 3.5mm audio, cheap USB DAC) -> 3.5mm analog -> hifi analog input -> your ears

I wouldn't waste money on an expensive DAC. As I mentioned above... 320Kbps lossy audio. No point in a crazy DAC. No point in going through hoops to use your existing DAC.

Can confirm yak shave as commented by another. Full yak shave. I looked it up.