I am just getting sick of switching when recording in pro tools, i liked it when it was just one main output. I have to switch to HP L/R just got here it on the headphones. if i put it on main i have to turn the volume up and it controls both headphone and speakers. i want just one source where i can control my volume of headphones and speakers with the knobs. How do i change it to be just a main out no HP L/R.