#448 kbps ac3 5.1 vs stereo software#
As far as I know there is no free or open source software that can compress to DTS-HD MA or Dolby TrueHD, but if you wanted to release your project as an MKV instead of a structured BD you can easily include lossless FLAC audio. The only way to be sure your audio is transparent to everyone is to keep it uncompressed, or use lossless compression.
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It is even possible that some people would be able to distinguish between 640 kbps AC3 and the uncompressed original. I would advise you to spend some time reading on listening tests at the forums, and try some tests of your own. When it comes to audio, opinions are quite often bullshit. I also suspect it's quite likely that some people think they would easily be able to tell the difference, but if they actually tried to prove it via an ABX they would fail. This is not to say that 192 kbps is transparent to everyone it's possible that there are some people, maybe with better ears or better equipment, who can tell the difference. This is not opinion, this is fact: proven via a double-blind ABX test. This is transparent to me - I cannot tell the difference between uncompressed PCM and a 192 kbps AC3. Sadly my projects are lost due to an HDD crash… ? | thread | | fan preservation forum: | 10 Repliesĭolby's suggested bitrate for 2.0 in AC3 in 192 kbps. Ideally, it could be converted to DTS-HD MA or Dolby TrueHD, but I know no software (free and/or open source) that could do that, and these kind of decoders are less spread than AC3 and DTS. I thought also to use DTS, but to achieve a similar quality I should compress at higher bitrates, and AC3 decoder are a little more spread than DTS ones. You know, adding four PCM soundtracks could "eat" something like 9/10GB disc space, and leave only 15GB to video in a BD-25.Īs there are wonderful LD AC3 5.1 discrete soundtracks (and they are all 384kbps), I think a PCM 2.0 could be compressed with little or no artifacts at 640kbps (for BD/AVCHD) or 448kbps (for DVD) - or even less. I know, I know, laserdisc PCM soundtracks should be left "as is" (when possible, because they must be converted at least to 48KHz to be BD/DVD/AVCHD compliant), but I did my projects with several soundtracks in different languages, and I guess I could spare a little bit of disc space compressing them, and leave video more space.
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Laserdisc PCM to low compressed AC3 Author spoRv Date 1, 7:39 PM Author spoRv Time 1 7:39 PM Post link Laserdisc PCM to low compressed AC3 - Original Trilogy Sign In