Control 24 and head phone amp

[bellpro]

I have my head phone amp plugged into the aux out on my control 24. I still can not get any sound through to the head phones. please help me; Is there a setting I need to do in protools. I have an HD3 system

[jre3132]

do you have anything plugged into the aux in? If you don't and you want the stereo mix (same as Analog 1-2 output) to go to the headphones, press the monitor to aux button. Also make sure you have the aux output volume knob turned up.

[bellpro]

Thanks for your response. I don't have any thing in the aux in. when i press the talk back button i can hear it in the headphones
but not the over all mix

[jre3132]

ok, do you have the monitor to aux button enabled on the front of the C24? That should patch the mix through.