Originally Posted by fitzcaraldo215
I believe that a Losslessly compressed codec can sound no better than the original uncompressed master. Ideally, it should sound the same, compressed or uncompressed. But, several of us, notably on classical music videos, have found the compressed codecs to sound somewhat better than uncompressed LPCM
in playing the disk. It is obviously a subjective opinion, and there are exceptions. Also, there are few opportunities to compare compressed and uncompressed soundtracks side by side at home. I have not spent a lot of time listening to compressed sountracks with the player doing the decompression vs. the prepro, though.
As I said, it's impossible for the lossless codec to sound better that what went into it...
While I think, as you did, many would like to think they can attribute that to jitter, outside of a studio environment, and being able to have a clock you can turn "off" (i.e. create jitter) I think it's a case of "golden ears" claiming to hear a difference when they in fact haven't been able to properly listen to the two side by side...
Placebo is a surprisingly powerful persuader.
But, here are a couple of theories as to why we think compressed sounds generally better. First, almost all more recent disks are using Losslessly compressed to save space on the disk. But, possibly the engineering and gear used on the recording side is more up to date and therefore better in many cases.
That statement confuses me...
They are recording everything to PCM.. what does better gear have to do with the lossless encoding of the original master?
Second, there is the controversial question of jitter in the playback chain. Potentially, compressed playback is lower in jitter because the decompression stage in the prepro is a buffered process that might lower playback jitter. The word clock is not recovered until after decompression of the data stream from the player, and HDMI is known to be a high jitter interface.
Those are my theories, FWIW.
If you read the link I provided, and any others on testing codecs, or comparing gear, speakers, etc... I think you'd agree that jitter is a hard thing to subjectively measure...
PCM over HDMI has the benefit of the audio being tied to the video "clock.."
The clock signal is sent separately over HDMI... and since we're talking about a closed system of two pieces of gear (and not bidirectional) IMO it's a non issue that people look at to validate what they think they might be hearing, or want to hear...
Jitter can be a big issue in my studio environment (and obviously it isn't because everything gets sync from a master clock, and even when locking external DAW's with time code, our margin of error is usually within +/- 1 samples)..
don't think you can chalk up an argument that lossless sounds better than the PCM it was made from due to jitter (without being able to actually measure jitter on a scale that would be audible, you're in the dark as to how much jitter, if any there is....)
If you are looking for a difference in the first place, you're bound to find one.
Just my .02.. FWIW.