I did a stereo mix and kept the integrated LU using the Loudness Meters (EBU R128) from peaking past 0. I have never had a broadcaster reject audio mastered like this.
I am now doing a 5:1 mix of that track. When I simply change the project to 5:1 sound from Stereo and assign my output channels appropriately the Loudness Meters (EBU R128) indicate the mix is to hot - the integrated meters peak above 0 at 5.0 LU
Why is this? Is it a bug? Is there something different in how the Loudness Meters work in 5:1 versus Stereo resulting in signal that is too hot? Do I have to relevel the whole film to keep it 'legal'?
Any advice would be appreciated.