Any references to specific source material causing these issues? Ways to reproduce?

• Carsten

Seems to have happened on a load of different material being prepared for a film festival. I'll get some of the bad audio soon and maybe that will give some idea.

Quick check with 2.11.67 in Sierra shows no obvious issues with either MidSide nor UpA or UpB. A Film Festival? Why the heck would a film festival use the upmixers?

Did they try a previous DCP-o-matic version with the upmixers as well?

Maybe ask about this in the forum or the mailing list?

• Carsten

Thanks for checking. This is the first version with upmixing he's tried. He's under some time pressure but once that's sorted I'll try and get some more details. I have to say I've never been particularly convinced that the upmixers should be there...

He should probably just pass through the audio 1:1 for now, a festival, and under pressure, is not the place and time to try and use them. This is not Philipp from Regensburg? Their festival starts soon. Looking at LUFS is probably much more helpful in this situation. Recently I did quite a few tests for useful level recommendations. -20LUFS is a good rule of thumb for now.

• Carsten

It's not Philipp. I'm waiting for some MXF samples to see if we can decide how bad things are!

No samples have yet been forthcoming. I've added a hint about the experimental nature of the upmixers.