Audio decode question

[blkhrt]

I am hoping that someone with more experience and knowledge can help me. I am currently using an LGBD390 as my player and a Pioneer VSX 9040TXH receiver. The player is set to Primary Pass-Thru on both HDMI and SPDIF, with a sampling frequency of 192Khz. Normally, I can keep my receiver on Auto Surround, and the proper HD audio format will be the default. However, every once and a while it doesn't select the proper format. Usually this happens on Criterion disks, where I will have to search around through the different receiver options until I can find the HD audio, and sometimes I can never find it. For example, I was watching Harold and Maude last night, and could never get the audio right.

Can anyone suggest a better way to set up my player and/or receiver so that the HD audio will automatically be the default, even on Criterion titles?

Thanks in advance!