The Scarlett 4i4 hardware interface provides the means for connecting microphones, musical instruments or line level audio signals to a computer running Mac OS or Windows. The signals at the physical inputs can be routed to your audio recording software / digital audio workstation (referred to throughout this User Guide as the “DAW”) at up to 24-bit, 192 kHz resolution; similarly, the DAW’s monitor or recorded output will appear at the unit’s physical outputs. Audio sources – mics, instruments, etc. - connected to the physical inputs can be recorded in the DAW and then routed from your DAW to the physical outputs. The 4i4 is equipped with four audio output channels, which can be connected to an amplifier and speakers, powered monitors, headphones, DJ or other type of analogue mixer, or any other analogue audio equipment that you wish to use. Although all inputs and outputs on the Scarlett 4i4 are routed directly to and from your DAW for recording and playback, you can configure the routing within the 4i4’s accompanying Focusrite Control application in order to meet your needs. The 4i4 also acts as a convenient MIDI interface between your computer and other MIDI equipment. For DJs, the four analogue outputs make it possible to have a stereo master output and a headphone cue channel when mixing internally on a laptop; alternatively you have two separate stereo outputs at your disposal for connection to an analogue DJ mixer.