The latest in MOTU's award-winning UltraLite series, the UltraLite-mk4 is a USB audio interface with 40 simultaneous I/O channels (18 in, 22 out). It also delivers exceptional sound quality, new ultra-low latency drivers and expanded DSP for studio-grade mobile audio recording.

Superb audio quality
New for 2018, the UltraLite-mk4 now includes renowned ESS Sabre32™ DAC technology, delivering 123dB dynamic range and the same proven, award-winning audio quality as MOTU's flagship 1248. Renowned drivers deliver rock-solid performance and industry-leading low latency.

Ultra-low latency
New, optimized drivers for both Mac and PC deliver ultra-low latency performance. With a high-performance DAW such as Digital Performer, the UltraLite-mk4 delivers an astonishing round trip latency (RTL) of 1.83 ms (milliseconds) on OS X and 1.84 ms on Windows over USB (at 96 kHz with a 32-sample host buffer).

Built for studio and stage
Housed in a compact, aluminum-alloy enclosure you can take anywhere, the UltraLite-mk4 is equally well-suited for studio and stage, with or without a computer. As an interface or mixer, the UltraLite-mk4 provides 18 ins and 22 outs, for a total of 40 simultaneous I/O channels.

All the I/O you need
Connect all of your audio gear, including speakers, headphones, mics, guitars, synths, keyboards, drum machines, effects processors and even MIDI devices.

Large console-style mixing
Record, monitor, route and process all live inputs using the on-board 48-channel, console-style mixer, with no latency and no processor strain on your computer.

Modeled analog EQ
and compression
Further sculpt your sound with 4-band parametric EQ featuring filter types carefully modeled after British analog console EQs. Choose between two forms of compression: a conventional compressor and the Leveler™, an accurate model of the legendary LA-2A™ optical compressor that provides vintage, musical automatic gain control.

Advanced Extras
Analyze and scope your audio with advanced diagnostic tools, including a full-screen real-time FFT display, spectrogram "waterfall" display, full- featured oscilloscope, X-Y plot and phase analyzer.

Mobile recording and mixing
After recording and mixing in the studio, take the UltraLite-mk4 on the road with your laptop for mobile recording and live mixing.

Web app control from any device
Control everything from your laptop, tablet and smartphone
The software that you use to control the UltraLite-mk4 doesn't reside on your hard drive. It's a web app served from the hardware itself. This means you can control the UltraLite-mk4 on-board DSP, mixing, device settings, and network audio routing from your favorite web browser on a laptop, tablet or smartphone connected by wire or Wi-Fi to your local area network. Use any web client on any platform - Mac, Windows, Linux, iOS, Android - as long as it shares the same network.

The art of the mix on your touchscreen
Designed specifically for touchscreen operation, Touch Console™ delivers a whole new mixing experience. Access Touch Console from your tablet or smartphone to effortlessly control the powerful 48-channel mixer and effects in the UltraLite-mk4. With large targets for your fingers, multi-touch operation and intuitive design, you can tap, swipe and pinch your way to a perfect mix, every time.

Solid Metal Chassis
The UltraLite-mk4 aluminum chassis is lightweight, yet incredibly sturdy and durable, and designed to withstand the rigors of the studio, stage, and tour bus. In a world awash with cheap plastic, the cool touch of the UltraLite-mk4's metal exterior in your hands is a reassuring reminder that you are holding quality engineering and construction built to last.

Rack mounting brackets
Use included brackets and hex bolts to mount the UltraLite-mk4 on rack rails, as shown here with a companion MOTU micro lite MIDI interface.

Use the included jointer bracket to connect another MOTU half-rack interface (MIDI or audio). You can then mount them together in a standard 19-inch equipment rack.

• Sample rates 44.1, 48, 88.2, 96, 176.4, 192 kHz
  
• Mic/guitar inputs 2 x combo XLR/TRS mic/guitar inputs
  
• Preamp gain: 0 to +60 dB (digitally controlled)
  
• Instrument gain: 0 to +30 dB (digitally controlled)
  
• Analog inputs 6 x 1/4" TRS line inputs (balanced/unbalanced)
  
• Max level: +24 dBu (digitally adjustable -96 to +22)
  
• Analog outputs 10 x 1/4" TRS line out (balanced, DC coupled)
  
• Max level: +20 dBu (digitally adjustable -4 to +20)
  
• 1 x 1/4" TRS stereo headphone
  
• Digital I/O 1 bank (8 ch) of ADAT optical at 1x sample rates
  
• 1 bank (4 ch) of SMUX optical at 2x sample rates
  
• Switchable to stereo TOSLink (optical S/PDIF)
  
• 1 x stereo S/PDIF on RCA (up to 96 kHz)
  
• Total I/O 18 in / 22 out (40 total) at 1x sample rates
  
• 14 in / 18 out (32 total) at 2x sample rates
  
• 8 in / 12 out (20 total) at 4x sample rates
  
• Computer I/O 1 x USB 2.0 audio class compliant
  
• USB 3.0 and iOS compatible
  
• Computer I/O channels 64 in/out at 1x (44.1 to 48 kHz)
  
• 32 in/out at 2x (88.2 to 96 kHz)
  
• 24 in/out at 4x (176.4 to 192 kHz)
  
• MIDI I/O 1 x MIDI IN
  
• 1 x MIDI OUT
  
• 16 MIDI channels to/from computer host
  
• Headphone 1 x 1/4" TRS stereo phone (assignable)
  
• Phantom power 2 x individual +48V
  
• Front panel 1 x 1/4" TRS headphone output
  
• 2 x XLR/TRS combo inputs
  
• 1 x digital rotary encoders • main/phone vol/pwr
  
• 2 x digital rotary encoders • mic/instr input gain
  
• 4 x switches • (2) Pad and (2) 48V Phantom pwr
  
• 128 x 48 pixel LCD for level meters / menu nav
  
• Power External 12-18V DC power supply
  
• 1.0A max • tip pos or neg
  
  Dimensions and weight (width x depth x height, enclosure only)
  
• 8.6 x 7 x 1.75 inches
  
• 22 x 17.75 x 4.5 cm
  
• 2.3 lbs / 1.04 kg
  
  Mac System Requirements
  
• 1 GHz Intel-based Mac or faster
  
• 2 GB RAM; 4 GB or more recommended
  
• Mac OS X version 10.8 or later
  
• Available USB 2.0 or 3.0 port
  
• A large hard drive (at least 500 GB for recording)
  
  Windows System Requirements
  
• 1 GHz Pentium-based PC compatible or faster
  
• 2 GB RAM; 4 GB or more recommended
  
• Windows 7, 8 or 10
  
• Available USB 2.0 or 3.0 port
  
• A large hard drive (at least 500 GB for recording)
  
  Web App Support
  
• Any web client platform: Mac, Windows, Linux, iOS, Android
  
• Any web browser: Safari, Firefox, Chrome, Opera, Explorer, etc.
  
  Included Software
  
• MOTU Discovery App for Mac & PC (finds connected MOTU interfaces)
  
• MOTU Discovery App for iOS (available from Apple App Store)
  
• MOTU Pro Audio Control web app (served from the hardware itself)
  
• MOTU Audio Tools (FFT, oscilloscope, X-Y plot, phase analyzer)
  
• AudioDesk 4.0 for Mac & PC (separate download)
  
  Operating Systems
  
• For computer audio I/O: Mac OS X 10.8 or later; Windows 7 or later
  
• For web app control: Mac, Windows, Linux, iOS, Android