I am not sure if this is the right place for a question like this but here it goes. I am needing to set up a public address system with possible AV capabilities for videos/slideshows. I was looking at a Linux system to control the mixer, but I haven't found anything I can use. Currently we have our mixer and inputs up at the front of the auditorium. I need to move it to the rear of the auditorium to be able to control it properly and remain out of the way of the people making presentations. We currently don't have wireless Mics or speakers. I looked at getting a sound card or external sound box via usb to plug in mics wireless receiver but haven't found any that would work. My plan is to control it from the rear of the auditorium with as few wires as possible, as well as keeping costs down. I would prefer to rid ourselves of the old mixer if possible. Any ideas or suggestions would be great.