Focusrite Scarlett 2i4 USB Interface Plus FREE Toontrack EZmix 2 Focusrite 2i4 Interface Plus Toontrack EZmix 2 Exclusive Bundle Scarlett 2i4 is a 2 in / 4 out USB audio interface featuring two award-winning Focusrite pre-amps and four high-quality audio outputs EZmix 2 is a powerful package that combines a multitude of quality studio effects with the know-how of professional engineers