This is our compact yet versatile USB audio interface. It gives singer songwriters two natural-sounding Scarlett mic preamps and class-leading sound quality. Scarlett is the best selling USB audio interface range in the world, and for good reason. It focuses on just three things; achieving the best sound, the fastest. Focusrite Scarlett 18i20 2nd Gen. USB Audio Interface. bit / kHz. 18 Inputs and 20 outputs. 8 Scarlett microphone preamps. €. ,74 DKK. (35).