[User 182116]

So AAC 5.1, which I'm adding 2 further options.

1.) Passthrough of AC3 enable, Speaker Numbers 2.0 (expected AVR displays AC3)

All is fine.

2.) Passthrough of AC3 disabled, Speaker Number 2.0 set (expected AVR displays PCM and all channels should be transmitted as PCM 5.1)

All is fine.

3. 1.) Passthrough of AC3 enable, Speaker Numbers 5.1 (AVR displays PCM)

Only limited sound as originally experienced.

4. Passthrough of AC3 disabled, Speaker Number 5.1 set (expected AVR displays PCM)

Only limited sound as originally experienced.


So the best solution (at least for me with these scenarios) is as per your original suggestion, which was AC3 enable, speaker numbers 2.0, where everything outputs in a manner that works well.