How to decode 6-track APTX-100 (cinema DTS) with the correct channel levels

[FoLLgoTT]

Gladiator and Fight club are DTS-ES mixes. Maybe it's just messing up those?

0.3.13 creates the 7th channel for "Gladiator", too. And the channel order was correct. Only 0.3.14 screws it up.

I think I need more DTS CDs for testing to find common patterns. I'm currently working on comparing different sound tracks from cinema and several home releases. Especially, comparing to the German sound tracks is sometimes interesting, because they usually don't get new mixes on new releases and stay more "original". For "Fight Club" the German tracks on Blu-ray have the least amount of clipping. The english tracks show a high amount of clipping and a compressed LFE. Only the new english UHD mix is nearly flawless in this regard.

[zoidberg]

The audio mixes on a number of Nolan movies were confirmed to be the far-field mixes, surely comparing the decoded C-DTS tracks would confirm the correct levels?

[FoLLgoTT]

I own the Criterion Blu-ray of "The Game" (1997) which contains the original theatrical mix as stated on the Criteroin home page and inside the blu-ray booklet. I compared it to the Cinema DTS CD.

I applied a high pass to the surrounds of the Blu-ray track at 120 Hz with 24 dB/oct. Otherwise amplitude and RMS are higher than on the already cut-off cinema track. All tracks were normalized so that the center channels had the same amplitude. I chose the scene with the loud music for comparison. The cinema track was decoded with +6 dB on the LFE and -3 dB on the surrounds with version 0.3.13.

The result are:

Contrast (RMS difference) Cinema - Blu-ray:

LFE: 0,78 dB (cinema is a bit louder)
Surrounds: -2.7 dB (Blu-ray is louder)

The front channels have a similar difference as the LFE. It varies between 0.2 - 1.1. If we assume that the Blu-ray track has the correct levels, the cinema track has to be decoded with -1 dB for the surrounds. -3 dB seems to be too much decrease.

One more thing: I always analyze the lower end of the spectrum with BEQDesigner, because it features a high resolution there. The high pass (usually around 20 - 30 Hz) often differs from track to track. Sometimes the Blu-ray has an steeper high pass or a higher cut-off frequency. And I have also seen it the other way around. In this case the Blu-ray is filtered a bit stronger, but not much. In any case a different spectrum makes comparison of amplitude and RMS difficult.