Okay, I'm not sure where to ask this question, but I thought I would see if anyone here could help. Basically, I have a set of active studio monitors and a separate headphone amp. My delta 1010 interface has multiple outputs and inputs so every time I need to switch between my headphones and monitors I just use the mixer inside my DAW to route audio to the appropriate outputs. As you can see, this is a major PITA. Also, I would like to be able to plug an mp3 player into my studio monitors without routing it through the computer. Finally, I want an external volume knob to control everything, so I don't have to reach for the mouse every time somebody comes into the room and I want to adjust the main level. I know a mixing board would solve my problems, but I really don't have the room or the finances for one. I'm also aware that mackie's "big knob" and presonus's "central station" are made to solve exactly for these home studio problems, but they are expensive. The solution: It seems like it would be very easy and cheap to throw together a simple passive control box that switches between two unbalanced stereo sources, and two stereo outputs, with a master volume attenuator. Here is a proposed wiring diagram I drew up: Mirror: http://img22.imageshack.us/img22/4493/deskcontroller.png So what do you guys think? Would this work? Seems too simple, but I don't see why it wouldn't work. Should I go ahead and build it? Thanks. EDIT: And what value pot should I use for the attenuator? 10K, 50K, 100K, 500K, 1Meg??? I have no idea.