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This topic comprises 3 pages: 1 2 3
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Topic: Barco DP2K-10S: Cropping around image?
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Carsten Kurz
Film God
Posts: 4340
From: Cologne, NRW, Germany
Registered: Aug 2009
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posted 05-07-2015 05:14 AM
Channelwise, cinemaprocessors will do a 1:1 translation from the audio channels contained in the DCP to the audio channels installed in the cinema. The only exception is 5.1 vs. 7.1, if 7.1 is installed at all.
When playing 7.1, the processor will feed 7.1 to the auditorium speakers, in detail: Left surround to Left surround, Right Surround to Right Surround, Left Backsurround to left Backsurround, Right Backsurround to Right Back Surround. When Playing 5.1 over the 7.1 system, the processor has to copy the audio from Left Surround to Left Backsurround, and from Right Surround to Right Backsurround, and adjust the level slightly so the surrounds do not come up to loud. If you have only a 5.1 system installed, you should not play 7.1 DCPs (back surrounds would be silent then). Most likely, you will never receive a 7.1 key to play it anyway. All 7.1 features also come with 5.1 versions, but both use/need separate keys to play.
The CP will also do EQ and level for all channels. If the installers were not skilled, the EQ will probably be bad just as well.
You should probably check speech intelligibility by using local native language, as well as original english language movies or trailers.
It's never a good idea to change EQ settings based on a single feature.
Dolby manuals are hard to find. If you need one for the 750, send me a private mail. Get at least issue5 of the CP750 manual.
- Carsten
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Marlon Martins
Film Handler
Posts: 78
From: Torres, RS, Brazil
Registered: Apr 2015
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posted 05-14-2015 02:45 AM
Today i believe we are "finished" (phew!)
the reason i believe the EQ was all over the place was the room, it wasn't isolated, causing resonance i believe in some frequencies, causing dialog to be hard to understand.
some test tones, sine swipe, some recording tests with a large diaphragm condenser mic, i was able to get a good equalization, to improve voice clarity and reduce a bit the resonance.
we also improved the LFE with another 18" speaker, and we HAD to get a compressor for the center channel. some movies (mainly dubbed ones) the difference between quiet and loud scenes was just too much. or we let the audio hard to understand in some scenes, or we let the speakers blow the ears to make better in quiet scenes. installed a behringer compressor, now the audio has less dynamic. i didn't like the idea of change the "originality" of the audio, but we really didn't have a choice. i could not recognize speech properly in some scenes on Avengers, and my ears are A+
today we will test Mad Max and tweak a bit more the audio settings.
thanks again to you guys, now my little town have a proper cinema that i can go and be proud of
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