When soloing any audio inputs, or buss, the audio is post fader so represents the actual level setting.
In the case of the master output, the level is pre fader. Not sure why.
This led to an error on a web cast where the master mix was heard in the headphones but the master fader was down so no audio to the live stream!

The ask here is set master audio monitoring to post fader. (or an explanation as to what the benefit is to a pre fade master)

Yes, same problem. We have to watch the visual output level indicator to try to balance our streamed output. Monitor via headphones doesn't help.

+1

I use a button on the stream deck with an activator to get the master audio status and adding a shortcut master audio is easy to see and resolve.

That doesn't solve the issue...we need the ability to listen to master out from the headphone output where the mix is not all the assigned input pre-fader. It makes no sense if we can solo channels and listen PFL to channels individually, and the master headphones output is all inputs assigned to master, but still prefader level. IMHO Master out listen should always be post fader level, so you are listening to what it actually being send to master.

Hello,

This is super weird because I have been using Vmix for years and I have been able to listen to the audio from the master bus but today I couldn't and it started working as TracyPeterson says: the headphone output is pre-fader of the master output.

What could have changed? Should the audiodevices of the master and headphones in the "audio ouput" section be different?

Anyone has been able to solve this?

Yes that is how it is currently designed to work, which is not in dispute. So how does one have the option of listening to the Master level from the headphones output and have a true ability to monitor it, if the headphone output is pre-fader level of the master? The only way to listen to the actual Master output and take the Master level gain into account is to listen to it outside of vMix. Show me a single audio console where you can't monitor the main output post fader. There's a reason for it.

If we are not intended to adjust the master level output, then why have the ability to do it in the first place? If the functionality is there, it's there for a reason, and that reason is that there may be times when you need to adjust it on the fly. If your headphones listening to master doesn't reflect the change in master volume, then it's not a true monitoring source. Look at every physical mixer out there. You always have the ability to monitor post fader.

I'll give you a quick example...I run a complex show where I have 30 or more preset zoom inputs for specific people. One of those people comes in with their mic super hot one day because they have their own dumb rodecaster mixer they like to play with. I can either 1. quickly turn down the master a bit until I am clear to go find their input and adjust it in the audio mixer, or 2. scroll through my dozens of inputs and go find it in the mixer and turn it down there directly, making the audience put up with the poor audio in the meantime.

That's just one example of why someone would want to adjust the master volume. Appreciate everything you guys do and hope this feature comes to pass.