Originally Posted by Paul E. Fox, II
Ok...not being a tech savvy as you two are, am I to understand that I can select the HD Audio track on Avatar and not miss anything versus my Oppo?
Correct. First, let's start with the audio that is actually on your Avatar disc. From blu-raystats.com:
DTS-HD MA, 48 kHz, 24 bits
Your Oppo will play that exactly, so you're good there.
Your PC's audio solution maxes out at 16 bits, and 48 kHz as compared to your Oppo.
The first thing you'll notice is that the max kHz is identical to what's on your Avatar disc anyway. So nothing changes there. Your PC is fully capable of the bitrate of your movie. (This will be true of 99% of movies as mentioned previously.)
The next thing you'll notice is that the bit depth is lower on your PC. To play this, the 24 bits must be "downsampled" to 16 bits. At first you might think, "gosh, that must be bad" but it's pretty crucial to understand what the bit depth actually controls. It handles the dynamic range of the audio, not the audio quality
, and while it's impossible to check on a particular disc, the dynamic range (the difference between the loudest and quietest sound) of the typical movie will fall well within what 16 bits can contain. Imagine having a gallon of water in a 10 gallon bucket. Now you transfer it into a 5 gallon bucket. Do you lose any water? No. Neither bucket is even close to being full. This is what's theoretically happening with the downsampling of 24-bit audio to 16-bits according to audio engineers. I read a post from one engineer who said it might matter if you want to be able to destroy your neighbor's eardrums with a symphony recording while still being able to hear the tuba player's nosehairs vibrating.
Ripping/Not Ripping is a moot point since the rip is a disc i
image...should perform exactly as the disc.
Where did I get that I couldn't utilize the Full Bitrate available on the Lossless HD codecs then?
People talking about stuff they don't truly understand or misinterpreting something from someone who does understand why it does matter in a very isolated case (one of those rather obscure discs with higher bitrate discussed before) and making a general assumption that a) it applies more broadly than it really does and/or b) it will be more drastic than it really is.