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Let There Be Rock - An expert technical opinion

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Posted 31 May 2011 - 08:41 PM

This exactly mirrors my thoughts on the film....I think they have done a fantastic job with the audio - the clips can even demonstrate that, but the video will NOT live up to heightened expectations - specifically the concert footage....They can surely enhance what is there, but if significant detail is missing then anything more than than the slightest in DNR will increase smoothness which, unless you are viewing on 4" monitor, [overly aggressive noise reduction algorithm = loss of detail / increase in sharpness = increase in noise] ...could look pretty smooth but a bit blurry...hope I'm wrong on this...

Quote

The Video

Despite a generally strong AVC encoded 1080p transfer in 1.37:1, AC/DC Let There Be Rock simply can't overcome the limitations of its source elements. This is a piece that was shot in virtual darkness a lot of time with what appears to have been smaller millimeter formats (at least some of the time), and therefore this feature has a somewhat murky and soft appearance. While grain is quite evident in any number of shots, it does appear that at least some moderate DNR may have been applied to this release, leading to a kind of smeary ambience some of the time. Colors are generally excellent, and things look a good deal better in the hotel "confessional" sequences as well as the sort of proto-music video which is included as part of the concert. But the main concert footage, which consists largely of the band playing in aggressive red (demonic?) light is very, very soft and suffers from fairly severe crush, so that backgrounds simply disappear and shadow detail reveals next to nothing.

The Audio

Thankfully things are much better on the audio side of things, which is probably the main calling card for fans, anyway. Aside from the original mix in Dolby Digital 2.0, this release sports an excellent lossless DTS-HD Master Audio 5.1 mix which offers incredibly robust low end, bringing the propulsive riffs of AC/DC fully to life. There are some occasional mix issues in terms of Bon not being mixed loudly enough above the band, but those are no doubt endemic to the original mixdown. The surround repurposing is really good and allows the individual instruments to really shine, giving ample breathing space to all of them. The drums are crisp and solid and the Young boys sound fantastic. Fidelity is excellent, and though the band typically plays everything "turned up to 11," dynamic range is also quite supple.


Here are some 1080p screen captures which are accompany the review. I think, like the video clips at thewb.com, you can really only assess the pics for color since there is further compression of these pictures and from pulling a few into photoshop and doing my own tests I would agree with the reviewer about the color fidelity. That has definitely been improved - vibrancy +1, no over-saturation and all images I pulled myself looked great.



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