M-AUDIO M-Track SOLO     Key Features          2-Channel USB recording interface for Mac and PC      (1) Combo input with Crystal Preamp for amazing audio quality      +48V phantom power for connecting studio condenser microphones      Dedicated instrument input for guitar or bass      Stereo line input for connecting digital piano, keyboard and more      1/8” headphone and RCA stereo outputs provide easy monitoring      USB/Direct switch for listening to the input signal or the computer signal      Software bundle, including: MPC Beats, AIR Music Tech Electric, Bassline, and TubeSynth, Revalver guitar amp plugin and 80 AIR plugin effects                                                                   M-AUDIO M-Track DUO     Key Features          2-Channel USB recording interface for Mac and PC      (2) Combo inputs with Crystal Preamps amazing audio quality      Dedicated switches to enable any microphone, instrument, or line level device      +48V phantom power for connecting studio condenser microphones      Stereo 1/4” outs; 1/4” headphone out with independent level controls      USB/Direct Mono/Direct Stereo switch for monitoring mic, line or instrument inputs in stereo or mono      Software bundle, including: MPC Beats, AIR Music Tech Electric, Bassline, and TubeSynth, Revalver guitar amp plugin and 80 AIR plugin effects