Surround Downmix coefficients?

[soundofdrums]

Does anyone know what Studio Pro’s stereo downmix from 5.1 coefficients are?
I know you can change settings in the Atmos renderer settings if mixing in Atmos but I can’t find a similar menu when mixing in 5.1. I would assume they would be something like this:

C > LR = -3dB
Surrounds > LR = -6dB
LFE muted

Can anyone confirm this? Or is there a way to edit these numbers anywhere?

 

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As I understood it 5.1 is just a bed, reproducing as well as possible your 'speakerless' Atmos mix. So if your mix has a source positioned between where two of your 5.1 speakers are, then both speakers will have some of that source. If you want to change that balance then you'll have to go back to your Atmos mix. I don't think there's an overall 'per 5.1 speaker' control you can set.

 

[soundofdrums]

Thanks for your reply.
Just to clarify, I’m not in an Atmos session, I’m in a 5.1 session and mixing isn’t the question here, it’s what happens with the automatic stereo downmix when I export the 5.1 to stereo. In typical ITU downmix coefficients the surround and centre channel info gets combined to the LR stereo channels and has a gain reduction applied in order to compensate for the lack of channels. Usually it is -3 for centre to LR and often -3 for surrounds to LR but sometimes that can differ between systems. My question is: what does S1/SP default to when rendering downmix to stereo from 5.1?
My surround monitoring system (trinnov DMon) defaults to -3 on both C and Surrounds, so it’s kinda important that I know what S1 will render to otherwise my monitoring will differ to my bounce.

 

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Ah, all good. No, I don't have an answer then