I've been working on and off on an integrated color organ and vumeter over the past few months. Part of the design is that there will be a central "hub" that will do all the filtering and user interfacing, allowing me to build the display itself separately. The intent is that this will allow me more design freedom in a display, since I won't have to fit all the circuitry into it. It's also cool, since this project is more self education than anything else. The minor problem is that I have no idea what type of cable or connector to use in order to make the design modular. So, is there a good cable/socket type for this purpose? It preferably needs at least five wires (high, low, mid, left channel, right channel), which is why I don't think USB is a possibility. Also, will it be necessary for one of the wires to be hooked up to ground of the central hub? My intent is for the display and hub to have different power supplies, with the filter outputs hooked up to transistors in the display, which will in turn "trigger" the leds. Forgive me if this is a glaringly obvious question; I'm entirely new to electronics, so I have no experience with cables and the like. edit: the display is going to be at least a foot from the central hub, if not more, so ribbon cables and the likes are out of the picture.