Hi-speed USB 2.0 audio interface for Mac and Windows — provides 16 inputs with 8 mic preamps and 12 outputs including separate phone and main outs for all the basic I/O you need for a powerful desktop studio.Eight XLR/TRS "combo jack" mic inputs — connect up to eight mics, or mix and match mics with guitars, synths, drum machines and other analog input signals.Flexible analog inputs — each provides a crystal-clear preamp (for both the XLR and TRS input), 24-bit 96 kHz converters, individually switchable 48-volt phantom power, 20 dB pad and front-panel trim controls. Mix and match condenser and dynamic microphones as your needs require.Eight channels of ADAT optical I/O — provides two sets of optical connectors to provide eight channels of optical digital I/O even at high samples rates (88.2 or 96 kHz).Operates as an optical expander — connect the 8pre to any ADAT optical compatible device (another audio interface, a digital mixer, etc.) to add 8 additional mic inputs seamlessly integrated into the mixing environment of the host device.Discrete ins/outs — there's no channel sharing in the 8pre; the mic inputs, ADAT optical I/O, headphone out and main outs are all handled as separate channels.CueMix DSP™ near-zero monitoring system.Multiple CueMix DSP mixes — create up to eight different monitor mixes for the main outs and headphones. Add send/return loops for outboard gear with no latency.Front-panel metering — five-segment meters for all analog inputs, plus status lights for clock and interface/expander mode.Sample-accurate MIDI — connect a MIDI controller and/or sound module with no separate interface needed. MIDI I/O is sample-accurate with supporting software.Expandable — add additional MOTU 8pre, UltraLite, 828, 828, 896, or Traveler interfaces for additional I/O. Or connect the 8pre optically to any audio interface or mixer that supports ADAT optical I/O.Separate TRS main outs and front-panel headphone jack, each with independent volume control.SMPTE time code sync via any analog input.SMPTE time code generation to any analog output.Includes native 32- and 64-bit drivers for Mac OS X (10.6 or higher) and Windows (10/8/7/Vista), including ASIO, WDM, Wave, Core Audio, and Core MIDI. Supports all popular Mac and Windows audio software.100% compatible with all host-based effects processing in today's popular audio programs.Includes full-featured sample-accurate workstation software for Mac and Windows with recording, editing, mixing, real-time 32-bit effects processing & sample-accurate sync.Plug-and-play operation with your Mac or PC via USB.Chassis dimensions, excluding rack ears and front and back panel knobs and connectors: 19 × 7 × 1.75 inches (48.26 × 17.78 × 4.45 cm). Knobs and connectors extend up to 0.5 inch (1.27 cm) from front and back panels, adding 1 inch (2.54 cm) to depth. With rack ears attached, fits standard 19 inch (48.26 cm) rack at 1U high.