Multiple audio inputs, how can others mix the 3 individual parts?

[esellwood]

I have configured my session audio inputs to receive 3 separate inputs and have played in sessions fine with the audio going through. The issue is people tell me they don't have separate controls on their personal mix to control the volume of each. 

I see the 3 separate inputs in my own personal mix, but how can I get these to show up for the other people in my session?