As if i didnt knew all this. U r not getting my point as well.
When i say a sound meant for coming from left back, comes ONLY from left back.
Right back, comes ONLY from right back.
Front left comes ONLY from front left.
And front right, comes ONLY from front right.....with the woofer giving bass.
Isnt that CLEAR ENOUGH? Oh, btw, do u know that in the above, when i said "Right back, Left back, Front left, Front right, i referred to a 5.1 channel speaker system?
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Easy Tiger! There is a huge difference when there are 5 different channels of output provided by the STB - when the HT has to just parse them through. and route them to appropriate speakers, rather than just having 2 channels, which then the HT uses its algorithm to figure out how to split them to 5 channels and then route to speakers.
I own a
Samsung 5.1 HT (not the latest one, this is 5+ years old, but has Dolby & DTS Support) which has a Dolby Pro Logic mode where it converts the 2 channel audio into a simulated 5.1 output. Like you said, I do feel that I am listening to real 5.1 channel sound, but let me tell you - there is a huge difference. For one - the 5 channel sounds are 'cut-out' & 'trimmed' from the 2 channel source, which means it doesn't have the detail and richness of a real 5 channel source. 2 Channel sources mostly come at bitrate of ~128Kbps while the 5 channel sources are generally upwards of 500 Kbps. This in itself should be a key point - the more the bitrate, the more the detail/richness of the audio.
You may still enjoy the simulated 5.1, but let me tell assure you - its not the same as 5 channel source. As an anology - this more like looking at a real
iPhone and one of those fake Chinese imitation. They look the same - both look wise and feel wise, but then dig deep and you see those ugly sides of the cheap imitation against the polished perfection of the genuine one.
If you want to really experience it yourself, let me suggest this. Download two DVD Rips of any good movies (suggested - a Hollywood action movie - for its sound effects). ensure that the first one has 2 channel audio and the second one has 5.1 audio (most Rips have this information updated in the info file). Watch/Listen to both of them - the two channel one in the simulated mode and the five channel one as it is. Once you do this, let us know if you feel the difference - or if you would still prefer the simulated ones.