Original Mono, Music and Effects Mono, Stereo Remix from LD [4964 CS] synced to UHD.
Since I don't want to create two duplicate threads for this movie, I also included as bonus the mono from previous Diamond Blu-ray synced to UHD.
All these to be shared by pm.

All these are in FLAC (24 bits for mono BD, the rest 16 bit), Stereo Remix is 2.0; the rest 1.0.

Here's an audio sync for another classic but lesser-known title. Before Diabolique (1955) & Wages of Fear (1953), Henri-Georges Clouzot directed Le Corbeau in 1943, under Nazi occupation of France. It almost derailed his career post-war, when Clouzot was accused of collaborating with the Nazis. But this film is anything but collaborationist, it served as an allegory to expose a society devoid of morality.

Picture quality first:

I took some screen caps comparing Criterion and StudioCanal's BDs. They are sourced from the same 4K restoration. To my eyes, grain on Criterion appears slightly more defined, so the Criterion BD is what I'll be syncing audio to. See M A's comments below. Criterion is actually sharpened a bit and has compression artifacts. I've added a sync to target StudioCanal as well.

Caps: https://slow.pics/c/h9sZull5

Now, audio:

Let's start with the 2005 Optimum (UK) DVD, slowed down to 23.976 fps. It's very hissy, but very detailed. There are some distortions during loud music, e.g. during opening, and artifacts elsewhere, but nothing I can't stand.



Next up is the 2004 Criterion DVD.

Criterion DVD Booklet Wrote:The soundtrack was mastered at 24-bit from a digital monaural mix, and audio restoration tools were used to reduce clicks, pops, hiss, and crackle.

Criterion BD Booklet Wrote:The original monaural soundtrack was also restored at Éclair, [...]

Criterion BD Booklet Wrote:The original monaural soundtrack was also restored at Éclair, with additional restoration carried out by the Criterion Collection.

• Optimum DVD is presented in 25 fps. I've slowed down the audio to 24/23.976 fps to match StudioCanal/Criterion BD's frame rate. Confirmed pitch through spectrogram afterwards--it matches theBDs.
  
• R channel at around 00:49:57 (SC BD timestamp) contains a very noticeable extra (digital?) artifact not present on L channel. There is another minor artifact only found on L channel at around 01:29:11 (SC BD timestamp) . I've patched in the opposite channel's signals during these two segments. The two channels are otherwise effectively identical, as confirmed by inverting the phase of R and downmixing to 1.0.
  
• There is a somewhat frequent "pop" (?) on the Optimum DVD track. I've detailed this at https://fanrestore.com/thread-5320.html. I fixed a few places before deciding to leave them as is because there are just too many instances. Hopefully you don't find them distracting. The Criterion DVD's high-pass filtering masks these somewhat, but they are still audible at places.
  
• I mostly synced by video. Where the frames diverged: 1) Optimum DVD has extra frame b/w Criterion BD timestamps 00:29:40.570-612, 2) DVD missed 1 frame during a dissolve b/w BD timestamps 00:49:47.067-00:50:23.812, 3) DVD missed 3 frames during another dissolve b/w BD timestamps 00:59:18.638-00:59:40.911, 4) DVD missed 1 frame b/w BD timestamps 00:59:40.911-952, 5) DVD missed 1 frame b/w BD timestamps 01:25:06.018-059.
  
• Criterion and StudioCanal's BDs are frame-wise identical, except that Criterion has an extra 456 frames at the beginning (Criterion & Janus logos).
  

I'm working on an audio sync and found that the DVD track I have contains some audio artifacts. Click? Pop? I'm not sure what the term is. For context, it's a film from the 1940s.

Here's a very short sample (ignore the hiss): https://voca.ro/1jBzL2dJmRNC

What it looks like on waveform:



And on spectrogram. It's the highlight in the low frequencies.


My questions:

• What's it called? Pop? Click?
  
• What's the best way to remove them? When there's no dialog, I can duplicate an adjacent segment to cover it. Otherwise, Izotope's "De-plosive" seems to work. Just wondering if there's a more proper tool because "De-plosive" is described as targeting "consonant speech sound."
  

More info can be found here:
https://blah-ray.blogspot.com/search/lab...%281948%29

Synced and level matched to the US blu-ray. Tape artifacts cleaned up via Izotope RX.
FLAC, mono, 339 kbps, 48 kHz, 16 bits

Looking for a Dolby stereo (2.0) LaserDisc or DVD track for the title - The Firm 1993
IMDB Info - https://www.imdb.com/title/tt0106918/

The audio can be out of sync etc., Will do the sync myself and share it to the community.

Regards

Bootleg restoration fan/hobbyist over here. Hope to one day contribute to this fine site, but for now will be content to poke around.

According to Blah-ray Blogpost, even though the mono mix on this dvd is in a lossy format, it sounds excellent than the Arrow and Polish Pro-Motion blu-rays where despite them being formatted in a lossless codec, it sounds like they took the audio from the Criterion dvd and applied a lot of strong noise reduction to the point where it sounds like it was underwater. The Criterion DVD sounds like it has minimal, if any, changes at all with the noise intact and the audio sounding clear.

However, there has been no update on whether the blu-ray from the Milestone Films Vol. 3 set sounds better or worse than the other blu-rays or the DVD. So for now, the DVD is the best sounding version of the audio I've heard.

I'm having a bit of trouble trying to sync the dvd mono track to the Blu-ray since it seems to desync as the film progresses. I was wondering if anyone wants to sync the audio to the blu-ray, here's the link to the audio track:
https://drive.google.com/file/d/1sCd2OYj...Jwg0Z/view

Spectrograms show that Kino's mono track is identical or very similar to the German MGM BD, which makes sense, considering MGM likely supplied the audio.

Per Blah-ray, the German BD has additional filtering on top of Criterion BD, and Criterion is the least terrible of the bunch.

Although they both sound bad, I can say there is still an audible difference between the two tracks, especially in ambient sound like the constant rain outside. The rain actually sounds very different, e.g. around 1:04:45 (UHD timestamp), with Kino sounding muffled and lifeless in comparison to Criterion.

Notes on the sync:

• Criterion BD is presented in 23.976 fps, while Kino UHD is 24 fps. I've sped up Criterion's audio to 24 fps.
  
• Criterion opens and closes with the MGM lion. Kino opens with United Artist logo instead. Well, I had to let go of that lion roar
  
• Criterion missed a frame in the middle of a shot (how??), between frames #102216, 102217. This is BD timestamps 1:11:03.259-1:11:03.301, or UHD timestamps 1:10:49.467-1:11:49.509.
  
• After accounting for the above, Criterion and Kino's A/V syncs still diverge very often, sometimes by up to 50-90ms. I've tried to compare them, but I found myself to be fairly tolerant of A/V desyncs. So, for simplicity, I've mostly kept to Criterion's sync seeing how nobody has complained in the >10 years since their BD came out.
  

I've been fairly active over at The Star Wars Trilogy forums and have been involved in some restoration work there.

After seeing several links to this site, I thought I'd give it a try.

It seems like there's alot of good posts here, and much valuable technical information.

Glad to be a part of the community!

Moshrom covered this back in the day: https://blah-ray.blogspot.com/2018/01/ci...-1988.html

According to him, the PCM 2.0 mono on the now-OOP 2013 Arrow UK 25th Anniversary BD was basically flawless. Judging from the cover art, I'd guess the 2017 Arrow US BD is probably identical.

Unfortunately, the same can't be said for Arrow's 2020 UHD. It sports a PCM 1.0 track instead of the previous 2.0 mono, but Arrow didn't simply re-encode the previous master as 1.0. Below is a spectrogram of the UHD's mono (my own disc), compared against 2002 Spanish Lauren Films DVD (I came across it on the Russian site). I've tried to match the spectrogram settings on Blah-ray.



And for reference, here's Moshrom's spectrogram of the 2013 Arrow BD:



It's clear that Arrow applied a low-pass filter to their UHD beginning at ~16kHz. Corroborating this is professorwho's post on BR:

professorwho Wrote:The PCM mono track sounds pretty good. I did detect some minor noise reduction at points, but it’s nothing too severe to my untrained ears, at least.