Hello there,
as i try to get familiar with audio syncing, i´ve come across several questions regarding how to start (as i´m sure there are different approaches) and seek help. So that i´m not getting used to a workflow which is fundamentally wrong.
The software i want to use is mostly freeware (audacity, eac3to; mkvtoolnx for merging video and audio but should there be a better way - as i´m sure there can be - i´m open to that)

I want to use a LPCM 2.0 track from my "La Haine" bluray and use it for the the UHD release of the movie (although it has a 2.0 DTS HD-MA track which seems to be the same audio - despite studio intro - just by looking at the two tracks in audacity, nevermind).
The UHD release is at 24 fps and my audio track comes from the bluray which is 23.976 fps. Both are 48 kHz

Now to my questions about syncing audio in general to understand the working concept (also for other projects):
1. Loading the audio track i want to use (from a older source or Laserdisc), one track from the new source into audacity and cut/add silence to the beginning of the old track to match the new track is the right way or do i have to do something different?

2. After editing a track, using eac3to to match it to the video source (if different fps) is also right?

3. Something i´ve come across while try to match different tracks in audacity: Even if the tracks have millisecond/sample-wise the same length, i hear a "hall/echo" effect while playing them simultaniously. Which means there not perfectly in sync?


BTW: Does anyone know (and have it) if the laserdisc audio from La Haine is the same audio track that´s found on the new UHD, just mastered to 2.0 DTS HD-MA?

It is common ground that the simplest way to convert 44.1kHz laserdisc PCM track to 48kHz is to capture it via digital cable by a bit-perfect audio card, then convert it to 48kHz

• no quality loss converting 44.1kHz to 48kHz
  
• less quality loss converting from 25fps to 23.976fps - or 23.976fps to 24fps
  
• if the laserdisc NTSC PCM frequency is really 44056Hz then capture it digitally at 44.1kHz, bit-perfect or not, is futile - unless it's possible to capture at 44056hz bit perfect
  

Bad Boys (1995) laserdisc [10716] SYNCED to UHD

Title: Bad Boys (1995)
Format/Catalog#: Laserdisc [10716]
Synced to: UHD
Input Soundtrack: 16-bit, 44.1khz, Stereo (bit perfect)
Output Soundtrack: 16-bit, 44.1khz, Stereo
Sourced by: BDgeek / alinskey
Ripped by: alinskey
Synced by: sertoli

Ghostbusters Special Edition #75 (1984) [CC1181L] SYNCED to UHD

Title: Ghostbusters Special Edition #75 (1984)
Format/Catalog#: Special Edition #75 (1984) Laserdisc [CC1181L]
Synced to: UHD
Input Soundtrack: 16-bit, 44.1khz, Stereo (bit perfect)
Output Soundtrack: 16-bit, 44.1khz, Stereo
Sourced by: BDgeek / alinskey
Ripped by: alinskey
Synced by: sertoli

Mission Impossible (1996) Laserdisc [PILF-2377] synced to UHD

Title: Mission Impossible (1996)
Format/Catalog#: Laserdisc [PILF-2377]
Synced to: UHD
Input Soundtrack: 16-bit, 44.1khz, Stereo (bit perfect)
Output Soundtrack: 16-bit, 44.1khz, Stereo
Sourced by: BDgeek / alinskey
Ripped by: alinskey
Synced by: sertoli

Total Recall (1990) [LV68901-WS] LBX-SRD-THX synced to UHD

Title: Total Recall (1990)
Format/Catalog#: Laserdisc [LV68901-WS] LBX-SRD-THX
Synced to: UHD
Input Soundtrack: 16-bit, 44.1khz, Stereo (bit perfect)
Output Soundtrack: 16-bit, 44.1khz, Stereo
Sourced by: BDgeek / alinskey
Ripped by: alinskey
Synced by: sertoli

Aladdin (1992) Laserdisc [1662 AS] synced to UHD

Title: Aladdin (1992)

Format/Catalog#: Laserdisc [1662 AS] 
Synced to: UHD
Input Soundtrack: 16-bit, 44.1khz, Stereo (bit perfect)
Output Soundtrack: 16-bit, 44.1khz, Stereo
Sourced by: BDgeek / alinskey
Ripped by: alinskey
Synced by: sertoli

Taxi Driver (1976) Laserdisc [PILF-7133] synced to UHD

Title: Taxi Driver (1976)
Format/Catalog#: Laserdisc [PILF-7133]
Synced to: UHD
Input Soundtrack: 16-bit, 44.1khz, (bit perfect)
Output Soundtrack: 16-bit, 44.1khz, 
Sourced by: BDgeek / alinskey
Ripped by: alinskey
Synced by: sertoli

Taxi Driver Special Edition #109 (1976) Laserdisc [CC1218L] SYNCED UHD

Title: Taxi Driver (1976)
Format/Catalog#: Special Edition #109 (1976) Laserdisc [CC1218L]
Synced to: UHD
Input Soundtrack: 16-bit, 44.1khz, (bit perfect)
Output Soundtrack: 16-bit, 44.1khz, 
Sourced by: BDgeek / alinskey
Ripped by: alinskey
Synced by: sertoli

Hi,

I was wondering if anyone had done a bit-perfect rip of the isolated music and effects track from the 1989 MGM/UA LaserDisc of The Wizard of Oz. I would like the track to be a PCM WAV file so I can mux it to a rip of the 1999 DVD (which I own), and I would like the track to be sync-able to the rip. I don't have the 4K Blu-ray release, since I don't have anything UHD-related yet.

Thanks!