Re: [DCP-o-matic] 5.1 mix PLEASE HELP

On Mar 4, 2019, at 8:46 AM, Carl Hetherington <cth(a)carlh.net> wrote: Hi Manuel I've looked at the metadata and the matrix looks OK. The analyse audio is a good call. Kind regards, Carl > On Mon, 4 Mar 2019, Manuel AC via DCPomatic wrote: > > To be honest, it sounds like a very common error. > > Does your sound matrix in dcpomatic looks like the first image here? > https://dcpomatic.com/manual/html/ch06s05.html > If not, and every track is assigned to Center, you just have to assign > them properly. > > It happens when instead of a single track with 6 channels, your file > have separate tracks with a single unidentified channel on each. > Carl's magic assignation can work around several of this cases, but > not all of them. > > When hearing it on a computer, is hard to hear even if the stereo is working. > When in doubt, I like to use Analyse audio in dcpomatic, and looking > at the waveforms is easy to spot all-center, dual mono (bad stereo > exports), and even swapped channels. The most common errors. > > Manuel AC > > On Mon, Mar 4, 2019 at 10:17 AM Carsten Kurz via DCPomatic > <dcpomatic(a)carlh.net> wrote: >> >> >> Am 04.03.2019 um 03:04 schrieb Zach Johansson via DCPomatic: >> >> My thought is it is a problem with their projector at the theater not reading the audio corretly because the DCP file for sure has all 5.1 and they play back on a computer with audio. >> >> >> >> That would be pretty weird, though I know a small club cinema whose staff a sometime forgot to switch on their L/R amp and so played center only for a few months. As the center carries the most important dialog, and usually 'some music' as well, nobody noticed. >> >> The issue is probably easy to diagnose per se, the question is, how easy is it for you to go to the cinema and test? I would first use an official channel test DCP, e.g. from Dolby, to be played ahead of your DCP, that should make sure the audio system is setup properly. An 'official' test DCP could also convince staff that there is something wrong... >> >> We had it before though, that people created DCPs with all channels mixed into the center. It can happen based on the specific track layout of your source file. There are ways to check wether the channels are where they belong (e.g. by opening the audio mxf in an audio editor). >> >> Here is a ZIP File with 'official' Dolby 5.1 and 7.1 channel test DCPs (the 5.1 should be sufficient in your case). Make theatre staff play it before your DCP. >> >> https://wetransfer.com/downloads/4323ffec92a5ba9563a988b786070d2d2019030415… >> >> - Carsten >> _______________________________________________ >> DCPomatic mailing list >> DCPomatic(a)carlh.net >> http://main.carlh.net/cgi-bin/mailman/listinfo/dcpomatic > > > > -- > http://akadcp.com/ > https://www.facebook.com/akadcp > > _______________________________________________ > DCPomatic mailing list > DCPomatic(a)carlh.net > http://main.carlh.net/cgi-bin/mailman/listinfo/dcpomatic >