The only way you can get loseless audio is through HDMI or Multichannel connections ...:yes:
If your HTR has the multichannel input, you'll need to get a BluRay with multichannel output to be able to decode on the player and send the signal to AVR ...or get a new AVR (Onkyo 606 is one of the cheapest, or look for the old version Onkyo 605) ...:T