Welcome to the forum!
As far as I can tell, the Sony will output audio from both the HDMI OUT jack and the DIGITAL OUT jacks (optical/coax) at the same time. You can, however, set which jack has priority, and that will determine the quality of the audio being output from each jack. So, be sure to set HDMI as the priority. Because the blu-ray player will output audio from both sets of outputs (actually, from those and the analog outputs), the issue might be in how you have the new receiver set up. Here are some things to check, along with the appropriate page number in the owner's manual:
- Make sure that the receiver is set up to process the audio over HMDI (page 39)
- Set the input signal for the input source that you're using for the blu-ray player on the receiver (e.g. "BD/DVD") to HDMI (page 40)
Please let us know if that solves your problem or if it still doesn't work. Thanks.