ACN-ML – The Lockit flagship and hub of the sophisticated ACN System

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The ACN-ML Master Lockit is both the flagship and hub of the sophisticated Ambient ACN system.

It is a timecode master and ”On the Set“ metadata server. With its dual processor architecture, the Master Lockit truly is the most powerful timecode device we have ever built. Using the acclaimed Lockit timecode generator with its rock-solid, high-accuracy, temperature-compensated oscillator, along with the sophisticated ACN, the Master Lockit offers features like  generator-buffered timecode transceiving or 0.0ppm drift between linked units through the unique continuous jam with control and monitoring through the integrated web GUI.

The new control center for all Lockits in your arsenal



The Master Lockit adds control, flexibility and comfort to your existing Lockit setup. Being designed to perform as central hub in your system, the unit is able to display and control all other ACN devices on set.

Access the ACN control system using the browser of any computer or mobile device via Wi-Fi for elegant wireless functionality. This enables you to name your Lockits and assign them to the camera or audio recorder to which they are connected.

What’s more, you can remotely jam sync all units on set, view battery status, set the time, use time of day, see the last clap time of the ACN-LS. Thus, one ACN-ML on your sound cart or in your bag improves efficiency by enabling control and monitor capability from a single location. Simply switch on your Lockits in the morning, set them to the correct ACN channel, and mount them on the device. The rest can be performed remotely and you always are up to date what your units are doing.

Metadata Network



Cooke /i
Sound Devices
The Pixel Farm
Dimensional Imaging (DI4D™)
Screenplane 3D Rigs

Lockit Metadata Communication

As productions already use Lockits and connect them to cameras, 3D-rigs, Sound recorders…, ACN-equipped Lockit units can also read out device-specific metadata for transmission to the Master Lockit server. While the internal memory centrally stores and hosts all metadata collected through ACN connected units, iPads running LockitSCRIPT automatically sync their data though the Master Lockit’s router functionality.

Based on the unrivaled accuracy of the Lockit system, the ACN uses global timecode as reference to create a comprehensive shot list containing crucial clip information like name, roll number, start and stop times of each and every recording and machine.

ACN Partner Program

Ambient has developed Lockit OEM modules with full ACN capabilities available for effortless 3rd party integration. This provides other equipment manufacturers the ability to incorporate Ambient’s  highly accurate timecode and metadata network.

The ACN utilizes an extremely reliable, proprietary 2.4GHz  ̶  network with 16 selectable channels for communication to minimize lag and interference with other radio sources. All gathered information is buffered until it is successfully received and stored.

Remote control your Sound Devices recorder

Remote Features

With Firmware 4.1, we integrate remote functionality for the renowned Sound Devices 633, 664, 688, and 788T into the Master Lockit’s capabilities. The new Remote Control Tab in the Master Lockit’s web interface provides wireless access to the most important recorder functions like Record Start / Stop, Track Naming, Track Arming, Metadata entry for the current and upcoming clip, Circle & Waste Clip, Track Metering (with the 788T), Access to the metadata of the last clips.

Audio Professionals can also combine the added control of Master Lockit along with CL-12/ Alaia Linear Fader Controllers as they perform seamlessly together for even more powerful control of 6-Series Recorders.

Cross-Platform Elegance

The Master Lockit control surface is self-contained and accessible from any device with a browser and WiFi – so it is not bound to a specific platform like iOS or Android. In other words, any device with integrated WiFi and browser can connect to the ACN-ML web interface without limitation.

Thanks to its responsive design, the control interface will always automatically adjust to your screen size. This not only enables use of a notebook on the sound cart, it allows seamlessly switching to a smartphone for run-and-gun situations.

More about  Sound Devices Remote functionality

DIT Features

Automatic Communication

With the LockitScript app, script supervisors note content information for every single clip. The Master Lockit Web Interface enables DITs to access the merged data through the Master Lockit in real-time, and to download important clip-based content information as e.g an ALE-File for direct import into your pregrading software.

Metadata Export


  • Tell a script supervisor to work with the LockitScript app and a Master Lockit on set
  • Connect to the Master Lockit WiFi with your laptop
  • Enter the Master Lockit Web View in a browser
  • Go to Tab “Metadata Export” and select the information and format you need
  • Download the selected file directly to your accessing device

Included LockitScript App

The LockitScript app elegantly accommodates all the daily needs within the demanding role of a Script Supervisor. This comprehensive and time-saving tool helps fighting paperwork, duplicate listing and overtime after wrap. 
Both the ACN timecode devices and the LockitNetwork apps are excellent stand-alone tools. Once used together, you can experience the beauty of two worlds working smoothly together.
That’s why we decided to include a free-of-charge LockitScript app license with upon registration all ACN Lockit devices (blue).
Register your Lockit here and receive the LockitScript promo code to get your LockitScript app.

Connect what belongs together.

Double Timecode and Power I/O

In addition to the double timecode interface and ACN antenna port, the ACN-ML provides two DC I/O connections for power loop-through capability. The built-in Li-Ion backup battery is automatically charged with external DC and keeps the unit including WiFi up and running for more than 3 hours.
The dual USB port is used for the included WiFi stick, and of course, available for product enhancements. The Ethernet port can be used to collect metadata from the ARRI ALEXA. The ACN timecode port additionally works as serial interface to read out RED cameras and to interface with Sound Devices audio recorders.
… more about Lockit Timecode
Technical Details
Integrated Lockit:
Highly accurate Lockit timecode generator
Generator buffered timecode transceiver
Drift of less than 1 frame a day (~0,1ppm)
No drift at all within the ACN
Supports all SMPTE frame rates
Sunlight readable OLED Display
Adjustable timecode output for recording TC on audio track
Built-In Hub:
Integrated 16GB server
Collects and stores all ACN and LockitScript metadata
Enables ACN - iOS LockitScript app communication
Reads and stores ARRI ALEXA metadata
Reads and stores RED camera metadata (all DSMC cams)
Reads and stores Sound Devices 788T & 6-series metadata
Creates Shot Log, Sound Report, ALE, CSV, JSON reports with collected metadata
Web Interface:
Remote Control of Master Lockit
Remote control of ACN ready Lockit devices
Remote control of Sound Devices 788T & 6-series recorders
Metadata Live view
Physical Details:
Material: anodized, pearl blasted aluminum
Dimensions: 91 x 64.5 x 33 mm (overall length with WiFi and SMA antenna detached: 102.5mm)
Mounting Options: 3/8" Thread, ACM-TL quick lock mount (not included)
Weight: approx. 275 g
Requires external DC Supply with 6-24V, 1.5A DC
Power consumption when charged / charging @ ext. DC Supply:
~ 500mA/850mA @ 6V
~ 250mA/ 400mA @ 12V DC
~ 150mA/ 200mA @ 24V DC
internal backup battery: Li-Ion backup battery, ~up to 3 hours when fully charged
2x USB
TC-Lemo 5-pin: tc I/O, adjustable tc level
ACN-Lemo 5-pin: 2nd tc I/O, Serial Interface
2x Hirose I/O to loop through DC


The Lockit

The new core member of the lockit family


Reads, stores and provides Cooke /i and ZEISS XD lens metadata

LockitScript App

The Ultimate Communication Tool for Motion Picture and Television Production