The Tascam US is a 16 in, 4 out USB Audio Interface that has 8 mic preamps and 6 balanced Line inputs all connecting to your Mac or. Tascam US Purchasing an audio interface can often be a minefield, especially for the amateur. There are so many products out there that. The TASCAM US is laden with features, at an affordable price point for any size of studio. TASCAM US 16x4 USB Audio Interface at a Glance.