Utilize the dual ADAT optical input and output ports to interface external 8-channel AD/DA converters (available separately). The Scarlett 18i20's 24-bit / 192 kHz converters ensure that signals are captured and reproduced with detail and clarity. With four balanced 1/4" line/monitor outputs, six additional 1/4" line outs, two 1/4" stereo headphone jacks, and independent control of the headphone and speaker volume settings, the Scarlett 18i20 can simultaneously feed multiple monitoring systems and outboard effects processors. Plus, the onboard talkback feature and built-in talkback mic streamline the task of communicating with your artists during recording sessions. Traditional 5-pin MIDI I/O is provided for seamless integration of MIDI equipment such as a keyboard or sound module, and S/PDIF coaxial ports allow proper routing of stereo digital gear. The Scarlett 18i20 connects to your Mac or Windows computer via USB and is powered through a connection to a standard AC outlet. The extensive software bundle includes music production software, virtual instruments, plug-in effects, loops, and more—plenty of tools to kick-start your inspiration.