That behavior is normal. The Digital audio out from the mixer is prefader when you are using the mixer as an interface.

To mute the sound in this way, you need to mute it on the Studio One faders.

There is a bit of a learning curve, and again when daw mode is released. Come back here with any questions, or feel free to PM me if you get stuck.

Thanks for the help Matt.

With the release of DAW Mode, will I be able to interface with post fader output?
Any work around for now? Patching combinations etc?
****I researched before made the 3k jump.... must have missed interface outs are ONLY pre fader...

With daw mode, there really isnt a workaround that is needed. Think of the mixer as having 3 roles essentially. It was designed to be a live mixer first. You would not want a live show that is being recorded to be affected by solo, mute, or fader position, so the digital out is always going to be prefader. So function one is using the mixer as a mixer.

Function 2 is using the mixer as an audio interface. A traditional recording interface does not have faders, only gain. You set the gain for a good digital input level, leaving some head room for processing and mixing. Mixing would be done in Studio One, using the mixer in Studio One. That is where you are monitoring, muting, panning, etc.

Function 3 is a daw controller, and this closes the loop on function 2. Daw mode will alow you full control of Studio One functions, using the Series 3 hardware to control the Studio One mixer. We are almost at the point where daw mode will be released to public beta, so you will shortly have that functionality.

Thank you for clearing things up.
I will wait patiently..