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MOTU LP32 4-Bank ADAT/SMUX Optical Interface

BH #MALP32 • MFR #9370
MOTU LP32 4-Bank ADAT/SMUX Optical Interface
Key Features
  • High-Speed USB 2.0 Interface
  • 4x8 I/O ADAT or 4x4 I/O SMUX
  • ADAT, USB & AVB/TSN for 128 Digital I/O
  • 48-Channel Software Mixer with DSP
Flexibly route, monitor, link, and apply effects to digital audio with ease using MOTU’s LP32. The device acts as an interface, router, splitter, mixer, and converter in one, and constitutes an ideal solution for routing ADAT, S/PDIF, and SMUX digital signal in live performance systems, networking installations, recording studios, and more.
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MOTU LP32 Overview

  • 1Description
  • 232 Channels of ADAT Optical (Lightpipe) Audio
  • 3Support for TOSLINK
  • 4Flexible, Router, Converter and Splitter
  • 5Standalone Operation with Wireless Control
  • 6DSP Mixing and Effects Processing
  • 7Low-Latency MOTU drivers
  • 8Comprehensive Metering
  • 9Convenient Headphone Monitoring
  • 10Word Clock I/O
  • 1132-Bit Floating-Point Processing
  • 12Expandable
  • 13AVB-TSN Audio Networking
  • 14Audio Analysis Tools
  • 15AudioDesk Software
  • 16Compatibility with Mac and Windows Software

Flexibly route, monitor, link, and apply effects to digital audio with ease using MOTU’s LP32. The device acts as an interface, router, splitter, mixer, and converter in one, and constitutes an ideal solution for routing ADAT, S/PDIF, and SMUX digital signal in live performance systems, networking installations, recording studios, and more.

The device features a USB 2.0 connection—class compliant and compatible with both USB 3.0 connections and iOS—for your computer. You’ll also find four discrete banks of ADAT optical channels, each capable of routing eight channels of 24-bit ADAT I/O at 44.1 and 48 kHz, or conversely, four channels of SMUX I/O at higher sampler rates (88.2 or 96 kHz). Each I/O bank can also be switched to handle optical S/PDIF. You'll find 258 simultaneous inputs and outputs in total. Located on the front panel, a headphone jack allows you to monitor any stereo source of your choice, giving you a dedicated volume knob to raise and lower the level.

By means of its Ethernet port, this unit can operate as part of a larger ecosystem of MOTU devices, all linking over an AVB-TSN and controllable wirelessly over Wi-Fi. For this express purpose, the MOTU Pro Audio Control web app has been created, working across platforms to provide seamless integration, manipulation, and coordination of digital audio. Any network you set up in such a fashion will function with ultra-low latency, even whilst handling hundreds of channels over long cable runs.

Also included is with the LP32 is a 32-bit, floating-point DSP engine. This engine provides a routing matrix with 48 channels and 12 stereo busses, as well as effects modelled on several prized pieces of hardware, audio analysis tools, and the AudioDesk DAW for Mac and Windows platforms.


32 Channels of ADAT Optical (Lightpipe) Audio

The LP32 gives you four independent banks of 8-channel ADAT optical at 44.1 or 48 kHz. It also proves four independent banks of 4-channel SMUX (16 channels total) at 88.2 or 96 kHz.

Support for TOSLINK

Each optical input or output is individually switchable to stereo TOSLINK (optical S/PDIF), regardless of the current sample rate setting (from 44.1 to 96 kHz).

Flexible, Router, Converter and Splitter

You can send any input to any output, or split an input to multiple output channels, and convert formats to ADAT, SMUX, S/PDIF, AVB-TSN and USB. This includes routing to and from your computer, as well as any devices on an AVB-TSN network.

Standalone Operation with Wireless Control

You can connect a standard Wi-Fi router with a standard Ethernet cable for wireless control of device settings, routing/splitting, 48-channel mixing and DSP effects. Indeed, you can control everything from your favorite web browser on a laptop, tablet, and smartphone, all while connected to your local Wi-Fi network.

DSP Mixing and Effects Processing

Included are a flexible 48-input digital mixer with seven stereo aux busses, three stereo groups, and access to 32 network inputs, as well as DSP effects, such as reverb, 4-band EQ, gate and compression. Some notable modules include emulations of the LA-2A, as well as a model of British analog-console EQ.

Low-Latency MOTU drivers

Universal connectivity over high-speed USB 2.0 (3.0 and iOS compatible), as well as AVB. These drivers deliver low-latency and solid performance.

Comprehensive Metering

The full-color, front-panel LCD lets you view all signal activity at a glance with detailed metering for all I/O. You can access hardware settings from an easy-to-read menu.

Convenient Headphone Monitoring

Assignable front-panel headphone output with volume control allows for monitoring of any stereo channel pair.

Word Clock I/O

Standard word-clock, BNC I/O for resolving to other digital audio gear, or house sync.

32-Bit Floating-Point Processing

The LP32's mixing and effects DSP engine delivers high headroom.


Add a 2nd MOTU AVB-equipped interface by means of a CAT-5e Ethernet cable. You can connect up to five MOTU interfaces using a MOTU AVB Switch (available separately).

AVB-TSN Audio Networking

Build a network with multiple interfaces and computers using standard AVB-TSN switches and network cabling, with low network latency, even over long cable runs (100m point to point). Stream hundreds of audio channels among devices and computers on the network.

Audio Analysis Tools

Tools for audio analysis includes a full-screen real-time FFT display, spectrogram "waterfall" display, full-featured oscilloscope, X-Y plot, and phase analyzer.

AudioDesk Software

Included with the LP32 is AudioDesk workstation software for Mac and Windows, which features 24-bit recording, sample-accurate editing and 32-bit mixing and mastering.

Compatibility with Mac and Windows Software

The LP32 ships with Core Audio drivers for Mac OS X for compatibility with virtually all Core Audio-compatible apps. Also included are ASIO and Wave drivers for Windows 7, 8 and 10, ensuring compatibility with practically all ASIO- and Wave-compatible audio apps.
UPC: 839128006089

MOTU LP32 Specs

Form FactorTabletop (Rack-Mountable with Included Hardware)
Display1 x LCD
Channels of I/O64 Input / 64 Output at 44.1/48 kHz
32 Input / 32 Output at 88.2/96 kHz
24 Input / 24 Output at 176.4/192 kHz
Maximum Sampling Rate192 kHz / 24-Bit
Number of Mic PreampsNone
Gain/Trim RangeHeadphone Outputs:
128 dB (in 1 dB Steps)
Analog Audio I/O1 x 1/4" TRS Headphone Output
Digital Audio I/O4 x TOSLINK Optical ADAT / S/PDIF Input (S/MUX Support)
4 x TOSLINK Optical ADAT Output (S/MUX Support)
Host Connection / USB1 x USB Type-B (Class-Compliant USB 2.0)
Sync I/O1 x BNC Word Clock Input
1 x BNC Word Clock Output
Network I/O1 x RJ45 Ethernet
Frequency ResponseHeadphone Outputs:
22 Hz to 20 kHz +0/-0.15 dB
Headphone Output Power80 mW into 16 Ohms (Max)
80 mW into 32 Ohms (Max)
80 mW into 55 Ohms (Max)
Dynamic RangeHeadphone Outputs:
108 dBA
THD+NHeadphone Outputs:
-100 dB
Digital Audio
Sample Rates44.1 / 48 / 88.2 / 96 / 176.4 / 192 kHz
ClockingInput Termination: 75 Ohms
Input Voltage: 1 to 3 V p-p
Output Voltage: 2.5 to 5 V p-p
Lock Range: 44.1 to 48 kHz ±0.5% of Sample Rate
OS CompatibilitymacOS 10.8 or Later
macOS 10.11 or Later (for AVB Use)
Windows 7 or Later
Processor RequirementMac:
1 GHz Intel
1 GHz Intel Pentium
RAM Requirements2 GB, 4 GB Recommended
Storage Requirements500 GB
Required HardwareAvailable Thunderbolt Port, USB 2.0 Port, or USB 3.0 / 3.1 Gen 1 Port
AC/DC Power Adapter12 to 18 VDC at 1.0 A
Power Consumption10 W
Rackmount Size1 RU (with Included Hardware)
Dimensions8.7 x 7 x 1.8" / 22 x 17.8 x 4.5 cm
Weight2.0 lb / 0.9 kg
Packaging Info
Package Weight4.16 lb
Box Dimensions (LxWxH)15 x 11.5 x 5.45"

MOTU LP32 Reviews

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