Jox wrote:The first (like most releases of the film even on Blu-ray) sounds to me like Mono on two channels, while the second one sounds like the proper stereo/surround mix (Goldblatt confirmed to me it was a four tracks stereo mix)
I analysed both sources digitally:
- Both have 2 channels (stereo)
- The LaserDisc version's channels are near identical (compensating for some differences due to analogue noise and compression). Approximately 99% similar
- The Blu-Ray version's channels are very identical (compensating for some differences due to analogue noise and compression). Approximately 85% similar
Overall the Blu-Ray version is more stereo than the LaserDisc version. But this is due to the reasons mentioned above, or it could be due to it being 'synthesised' stereo (or 'surround sound' ?). Also the nature of the audio in the samples was not an optimum selection for analysis.
Overall both sources are Mono.
NOTE: This is not a good analysis, because:
- When digitizing the LaserDisc, both channels may not have been captured (one captured channel could have been duplicated)
- YouTube may alter a video with a single channel to one with two channels (duplicating the single channel). (When uploading)
- YouTube may alter a video with two channels to one with two identical (duplicating a channel). (When uploading)
Only real way would be to create sources for comparison by:
- Digitizing the LaserDisc yourself, ensuring you captured both channels.
- Extracting video from the Blu-Ray, ensuring you do not re-encode it.