No, you are most definitely confused if you think that LPCM "quality" is why there is volume differences. We're talking about two digital streams of bits, so volume does not come into play here. It's quite possible that the sound levels are encoded differently across different protocols, but to imply that the difference has to do with "lossless quality" is very much misinformed.
I'm pretty sure me post has "and" in it. I think you got "confused" and left that out. I guess you have never changed from one type of input (from one connector to another) with the SAME source and noticed a big difference, huh? I guess you haven't experienced that because you haven't dealt with modern A/V receivers with TOSlink
and HDMI from the same source. I've used Denon, Pioneer Elite, Yamaha, and Sony high-end A/V receivers (most models), so I know it well.
It happens for different reasons. It is mainly from the source device. Different connector can be connected through a different DACs. If it's multiple sources, it can be that one is decoding internally and sending it to the receiver as LPCM. The other source could send it via bitstream to the receiver to be decoded (those are usually louder). All from a standard DD track off of the same disc.
The case I talking about was dealing with two different audio streams. That's why I asked you about your A/V receiver. If you were hooked up to the PS3 via HDMI, the default would have been the lossless audio intro through the HDMI connection. The Xbox 360 only has a DD output and can not output a lossless/uncompressed audio intro (or anything else for that matter). Therefore, the audio from the PS3 would be LOUDER
and have better quality than the XBox 360 to your A/V receiver. And, the Xbox 360 audio intro should be louder and have better quality than the Wii's intro audio. I hope that clears up your confusion.
I think there's a big difference between stereo sound and Pro Logic II -- not necessarily in quality, but definitely in positional audio. I think it's important to draw a distinction, especially in this context.
Yes. Actually stereo sound can be of MUCH greater audio detail per channel than anything else on the market for consumers (DSD would be an example). The average person only knows of stereo as an older technology of inferior quality. That's why I used "stereo" in the context that I did. But, to be technically accurate, stereo ONLY refers to how many channels there are. However, Pro Logic II is of a MUCH lower quality codec than any other audio codec alive today.
My A/V receiver doesn't do HDMI audio, I am using TOSlink. I'm just trying to point out that "quality" and "volume" are not the same thing, like you are implying.
I never said the audio quality (fidelity) and volume were the same thing. I just said they BOTH would increase via HDMI from the PS3 (by default). It's just the way it is.
Just to added a little about the PS3 via HDMI to A/V receivers (for others that are reading). Your volume WILL increase if you bitstream DD to your A/V receiver than if it is decoded by the PS3 internally and sent to your A/V receiver as LPCM. However, fidelity (audio quality) will not (can not) increase.