Are Universal Audio Interfaces and Satellites USB compatible?

Universal Audio make both audio interfaces and Satellites in USB compatible formats, but they are also available in Firewire and Thunderbolt formats.

How does the Satellite work with my setup?

Universal Audio Satellites are available in USB-3, Firewire and Thunderbolt formats, simply connect the Satellite to the relevant port on your computer and install the UA software, the plugins are then available to use within your DAW like any other FX plugins, but as they are running on the Satellite's processors, long reverbs and delays that can sometimes cause your DAW to buffer are played with silky smooth clarity.

What's the benefit of an Octo or Quad Core over Duo or Solo Core?

Put simply, the more processing power you have, the more plugins you can run at any one time. Some plugins use more processing power than others, and because they are so distinctive and high quality, we've found UA plugins to be somewhat addictive, so the more you can use the better.