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Originally Posted by prolific  When authoring a pink noise reference DVD using Dolby and PCM, the PCM imatches the SPL levels that my DAW is cal'd to, but the Dolby playback is 5db quieter in outputing SPL levels. |
If you have dialnorm at -27 when encoding AC3 (which is usually the default), then you are instructing the player to attenuate the signal by 4dB in playback. If this is the case, try with dialnorm -31, then it should produce similar output to PCM (also, see if your player has Dynamic Range Compression, and turn it off - that could also change the level). I suppose it is the same with Blu Ray, but I don't have experience with it yet.....
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Originally Posted by prolific So, when playing back the mix in Bass Management, there is a HUGE amount of level driving the subwoofer, since there is all this added low end from the mains along with the high level LFE channel |
I have personally not noticed this problem on my small home system (I _expect_ it to distort anyway, so I turn off my distortion-noticing brain circuits.) But in theory it makes sense, that the content from the mains will interfere with the LFE channel. I hope others have some words of wisdom on how to mix and monitor low frequencies (and especially Georgia - she is THE sub authority
I think you should make a new thread out of that question, you'll probably get more answers than here.....