As an audio engineer I can confirm that shielding is more important in a cable than whether or not it has gold plated connectors. Gold plated connectors don't really do much unless the connectors are worn down and don't make good contact in the first place, shielding actually does something for signal to noise ratio, especially for unbalanced and/or mic level(low level signal) and/or long cables. This is really only applicable for analog stuff for the most part of course.