This is topic 70mm Dolby Format 42 & 43 Compatibility Question in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.


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Posted by Michael Coate (Member # 757) on 08-18-2011, 04:33 PM:
 
For those with experience running 70mm-Dolby...

What happens if a 70mm-Dolby print intended to be played in Format 42 is played in Format 43? In such a scenario, I understand the left, center and right screen channels should be unaffected, but what happens to the surround and baby boom? If a #42 print is mistakenly played back as #43, will the audience hear any surround or baby boom?

Here's why I ask... The other day I attended a screening of a 70mm print and I suspect the sound may have been played back in the wrong format. I presume the film in question was a Format 42 mix, but after the screening I was informed it had been played in Format 43. During the presentation I detected no surround or baby boom, and I'm trying to determine if the film was deliberately mixed without any surround and deep bass content or if the film was played in the wrong format.
 
Posted by Brad Miller (Member # 2) on 08-18-2011, 04:40 PM:
 
And the title and theater was?
 
Posted by Michael Coate (Member # 757) on 08-18-2011, 04:43 PM:
 
Highlander. American Cinematheque's Egyptian, Los Angeles.
 
Posted by Lionel Fouillen (Member # 1475) on 08-18-2011, 05:17 PM:
 
Then I assume sub-bass would be played back correctly. As for the surrounds, you would only hear low frequencies below 500Hz, and no treble as they're taken from tracks #2 and #4 in format 43, where they are not present in format 42.
 
Posted by Scott Norwood (Member # 30) on 08-18-2011, 05:33 PM:
 
There should be no surround at all (even if the loudspeakers are capable of reproducing low frequencies), as the processor should high-pass tracks 2&4 before sending them to the surrounds (and low-pass them before sending to the sub). Sub output should be normal, however.

Going the other way, a format 43 print will play fine in format 42, but with mono surround.
 
Posted by Sam D. Chavez (Member # 1841) on 08-18-2011, 06:25 PM:
 
What cinema processor? CP200 with or without aux rack?

CP500, CP650?
 
Posted by Michael Coate (Member # 757) on 08-18-2011, 11:19 PM:
 
CP200.

quote: Scott Norwood
Sub output should be normal, however.
I didn't detect any. If what you're saying is correct, then what would explain my lack of detecting any subwoofer content (other than the possibility none had been recorded)?

quote: Scott Norwood
There should be no surround at all (even if the loudspeakers are capable of reproducing low frequencies), as the processor should high-pass tracks 2&4 before sending them to the surrounds (and low-pass them before sending to the sub).
And I didn't detect any surround. But...the film cans included a (hand-written) notation indicating "Stereo Surround" (see photo).

 -

The "Stereo Surround" indication on the cans was interpreted by the projection staff to mean: play in Format 43. (As far as I know, there weren't any sound format indications on the leaders or any printed enclosure.) However, Dolby's master list of Dolby Stereo films lists Highlander as "70" (rather than "70SS"), which is one reason, along with not hearing any surround during the presentation, that I think the title is actually a Format 42 mix. But if it is, in fact, a Format 43 mix, and the staff played it properly, what then would explain not hearing any surround content?
 
Posted by Monte L Fullmer (Member # 2797) on 08-19-2011, 12:48 AM:
 
Maybe two things:

1-The labeled can was for another print.. or,
2-The Staff didn't know the difference between the two formats.
 
Posted by Brad Miller (Member # 2) on 08-19-2011, 01:11 AM:
 
I've not ran that one in 70, but I find it odd the theater didn't pre-run the print (at which point if they had any sense of what they were doing would have noticed the lack of surrounds and thought to themselves "hmmm, maybe that red marker on the cans isn't the correct information...let's try format 42" and figured it out).
 
Posted by Sam D. Chavez (Member # 1841) on 08-19-2011, 08:42 AM:
 
I checked with an installer involved and was told it was a 650. Is there more than one 70mm screen?

If it is a 200, there could be a number of reasons for no subs aside for improper setup or installation. The 142 or 160 cards could be manually turned off for some reason, etc.

I could come up with more reasons, but aside from faults, even played in the wrong format, there should be subs present.
 
Posted by Edward Havens (Member # 4715) on 08-19-2011, 09:09 AM:
 
The American Cinematheque's Egyptian has two screens, but only one that is 70mm capable. Or, at least, I hope the 78 seat house isn't also 70mm capable.
 
Posted by Steve Guttag (Member # 268) on 08-19-2011, 09:16 AM:
 
Scott is wrong, btw, a Format 42 print played in format 43 WILL have the bass section of the surround track played by the surrounds. Subwoofer/Bass Enhancement will be un affected by the format mix up, however.

With a CP200, a quick check for format 42/43 is to look at the meters...if Le/S/Re all track together when the S meter moves..it is likely Stereo surround. If, on the other hand, S moves but Le/Re don't...it is most definitely Format 42.

-Steve
 
Posted by Michael Coate (Member # 757) on 08-19-2011, 11:50 AM:
 
quote: Brad Miller
I find it odd the theater didn't pre-run the print
They did pre-run the print.

quote: Sam D. Chavez
I checked with an installer involved and was told it was a 650.
The CP200 claim came from their Chief Projectionist minutes before I posted.

Although this may not be large or sharp enough to detect model numbers, here's a photo I took a couple of years ago of the audio racks of the Egyptian's main booth.

 -
 
Posted by Sam D. Chavez (Member # 1841) on 08-19-2011, 05:26 PM:
 
No doubt picture shows a 200 with an aux rack. Maybe the other screen has the 650?

But we still don't know why no subs. Perhaps someone stole them or the amps is defective.

I notice DA20's. Is each projector on its own DA20, or are there more than two 35mm projectors?
 
Posted by Lionel Fouillen (Member # 1475) on 08-19-2011, 05:28 PM:
 
What is the processor between the DA20 and the DTS6D ?
 
Posted by Michael Coate (Member # 757) on 08-20-2011, 11:58 AM:
 
Regarding the sound, it's still not clear if the presentation was faulty or if the movie just has a crappy audio mix. Anyway, in addition to the audio issues addressed, I'd like to mention that I found the picture portion of this presentation problematic. In this case, though, it was the lab's fault, not the theater's.

Highlander was a spherically-shot film (1.85:1), but the lab foolishly over-enlarged the image during the blow-up by filling the full width of the 70mm frame, thereby cropping a portion of the top and bottom of the image and making the image unnecessarily grainy and soft. The print itself was in mint condition, appearing to have been run only a handful of times.

So, overall, this was a disappointing presentation. I already dislike the movie, and this poor presentation didn't help. I had thought that seeing a 70mm presentation might give me a new appreciation for the movie. Nope.

If anyone's curious, the screening was in celebration of the film's 25th anniversary, and, as far as I know, was the first time it had been (commercially) screened in 70mm in the United States. This was the longer, original cut of the film, not the shortened version released by Fox. A Q&A with director Russell Mulcahy and producer Peter Davis followed the screening.

This 70mm print of Highlander is, in my opinion, a poor example of what can be achieved with 70mm, and I'm afraid now that this print has surfaced that other organizations will want to book it.
 
Posted by Monte L Fullmer (Member # 2797) on 08-20-2011, 01:54 PM:
 
...and to add ..

How many of us remember when Metro took "Gone with the Wind" and did a 70mm release of this film and did the same as with this "Highlander" release: made it full frame, thus did a lot of cropping from the original image .. and that was from a 1.37:1 frame image.
 
Posted by Michael Coate (Member # 757) on 08-20-2011, 05:11 PM:
 
The framing on that 70mm blow-up of Gone With The Wind wasn't unique. That blow-up technique was common with spherically-shot productions during the 1960s and 1970s. I had thought, though, that by the 1980s, with a few exceptions, that technique had been phased out in favor of pillarboxing the sides (which is why I was surprised by the image on Highlander, a mid-80s release).
 
Posted by Monte L Fullmer (Member # 2797) on 08-20-2011, 05:51 PM:
 
..like "E.T." and "Arachnophobia" - both blown up to 70mm releases and pillarboxed within the frame to keep the ratio intact.
 
Posted by Steve Guttag (Member # 268) on 08-20-2011, 06:48 PM:
 
However, WARGAMES was a 1.85 movie blown up to full-frame 2.2 70mm in 1983.
 
Posted by Lionel Fouillen (Member # 1475) on 08-20-2011, 06:55 PM:
 
Terminator 2 (1991) is another example. Shot in Super35, blown-up to 2.20 in 70.
 
Posted by Brad Miller (Member # 2) on 08-20-2011, 07:25 PM:
 
Terminator 2 isn't a good example though, as it was shot with the intention of cropping all the way down to 2.4:1.
 
Posted by Michael Coate (Member # 757) on 08-20-2011, 11:55 PM:
 
quote: Steve Guttag
WARGAMES was a 1.85 movie blown up to full-frame 2.2 70mm in 1983.
WarGames was one of the titles I had in mind when I wrote, "...by the 1980s, with a few exceptions, that technique had been phased out in favor of pillarboxing the sides..." Another is Rocky III (1982).
 
Posted by Monte L Fullmer (Member # 2797) on 08-21-2011, 12:05 AM:
 
Did "True Lies" make the 70mm releases when this was also shot in Super35?
 
Posted by Brad Miller (Member # 2) on 08-21-2011, 12:08 AM:
 
Yes, but there were only a couple of 70mm prints. (They were mag.)
 
Posted by Steve Guttag (Member # 268) on 08-21-2011, 12:11 AM:
 
Yes, True Lies had 70mm prints.

However, this deviation thread has NOTHING to do with Super-35 to 70mm...The discussion is only about a 1.85 movies being blown (cropped) to 2.2 for 70mm. While all Scope moves are also cropped for 70mm (except THE UNTOUCHABLES)...the side cropping from 2.39 to 2.20 is considered minor as little action is at the extreme sides...however headroom is severely compromised when a 1.85 composure is blown to 2.2.
 
Posted by Monte L Fullmer (Member # 2797) on 08-21-2011, 12:52 AM:
 
..why "GWTW" looked horrible and crowded on the big screen in 70mm...with the massive head/scene cropping..
 
Posted by Louis Bornwasser (Member # 3063) on 08-21-2011, 05:59 AM:
 
GWTW was so bad they had to mevhsnicsally reframe it condstantly at the studio level. Louis
 
Posted by Bob Bregazzi (Member # 5623) on 08-21-2011, 12:14 PM:
 
I remember seeing GWTW in 70mm in 1968. The cinema I saw it at was a large 2500 single screen. Due to the overhang of the balcony the picture was cropped by almost a hole, making more or less a 2.35 ratio. You can imagine what it looked like.
 




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