Can I connect directly to a receiver's DAC ?

Surround receivers like Yamaha RX-V3300 have DAC built in - can I connect a computer soundcard (that has an RCA or spdif digital out) directly to it by an RCA or spdif cable, to play music from a computer ?

Or I cannot access the DAC from such a soundcard ?

I know this sounds very basic, but please enlighten me ...

and how are the DACs usually, in upscale surround receivers from Yamaha or Denon, compare to stand alone DACs ?

Thanks in advance ...