Cakewalk has introduced a variety of new USB audio interfaces; the UA-4FX, UA-25EX and UA-101. The UA-4FX is a portable 24-bit/96 KHz interface featuring Roland COSM preamp emulation and several built-in effects. The device integrates analog inputs and outputs, along with S/PDIF optical output with support for Dolby Digital and DTS 5.1 formats.