4 Channel Level Magic Audio Processor - D*AP4 LM

With 4 processing channels, optional 3G SDI and optional logging features, the D*AP4 LM is the ideal solution for automatic and intelligent loudness management in real-time stereo TV or radio broadcast playout environments. Level Magic ensures maximum audio quality whilst maintaining compliance with all worldwide loudness standards.

    The D*AP4 LM audio processor provides automatic and adaptive loudness management compliant with all current broadcast audio loudness recommendations including ITU-R BS.1770 standards (1, 2 and 3) as well as recommended practices ATSC A/85 (2011/2013), ARIB TR-B32, Free TV OP-59, Portaria 354 and EBU R128.

    • Overview

    The D*AP4 LM audio processor features loudness control plus dynamic range processing and true peak limiting for up to four channels of audio (2x2.0). Fail Over and Voice Over are also included.

    • Level Magic and Dynamic Range Control

    Based on a unique multi-loop control principle, the Level Magic algorithm provides adaptive wideband loudness control with exceptionally high audio quality that is free of coloration, pumping, distortion or modulation effects. Level Magic is designed to be audibly transparent and due to its highly adaptive nature, requires only a small number of parameters to be input during initial setup. The adaptive dynamic section includes an expander/gate and upward compressor.

    • The adaptive dynamic section includes an expander/gate and upward compressor.

    Fail Over and Voice Over Fail Over allows automatic switching to a back up signal should the primary feed be lost, whilst Voice Over allows for seamless integration of voice and program content during continuity announcements or video description with automatic ducking.

    Spectral Signature

    The optional Spectral Signature dynamic equalizer is a powerful creative tool allowing adaptive control of the spectral balance of your content. Spectral Signature analyzes incoming audio and compares its spectral structure to a predetermined “reference” curve. This allows dynamic EQ corrections to be applied only if necessary to achieve a consistent sound image and tonal balance.

    Loudness Measurement and Logging

    For compliance with local regulations, loudness and true peak levels can be measured by the optional J*AM software. SNMP or GPI/O alarms can also be triggered if pre-set limits are exceeded. A real-time plot of input v/s output levels can be displayed and the results logged to a destination folder anywhere on the network. A log file analyzer rebuilds the original plot for easy readout of historical data.

    FM Conditioner

    For FM broadcast and cable head end applications, an optional license offers control of MPX power, pre-emphasis and true peak limiting.

    • De-Esser

    A powerful De-Esser is available as a license option to control and manage excessive sibilance from spoken voices.

    • Web Configuration

    A web interface allows easy and intuitive setup and configuration from anywhere in your network. Most parameters are based on the principle of “set and forget” so with a small number of initial settings, the unit can be up and running on air within minutes. On screen metering and measurements are available for easy reference and a dedicated “mobile” UI is tailored specifically for smaller displays such as tablets or smartphones.

    • System Integration

    All system parameters are remotely accessible allowing the unit to be integrated and operated by broadcast control systems. An advanced built-in Event Management tool allows the loading of parameter presets either by hotkeys on the optional X*AP RM1 remote panel, by 8 onboard GPI/O’s or by network commands using the Ember+ control protocol. This helps users to apply individual processing to their programs, a key feature for well-managed loudness control to effectively accommodate compliant and none compliant audio.

    Interfaces and System Security

    Audio I/O’s range from on board native AES3 to optional 3G SDI including video delay, MADI, Dante® audio over IP and also analog. Power fail bypass relays are fitted as standard and with dual redundant PSU’s and SNMP integration, the unit ensures maximum operational safety and peace of mind for today’s critical 24/7 broadcast or content delivery facilities.

    D*AP4 LM EDITION Feature Set
    D*AP4 LM EDITION Feature Set

    Key Features

    D*AP4 LM EDITION Processing Block Diagram
    D*AP4 LM EDITION Processing Block Diagram
    • Level Magic loudness management according to: ITU-R BS.1770 (all revisions), EBU R128, ATSC A/85, ARIB TR-B32, Free TV OP-59 and Portaria 354
    • Loudness measurement supporting all worldwide standards
    • True Peak Limiter
    • Dynamics with compressor and expander/gate
    • Fail Over with signal loss detection
    • Voice Over functionality
    • 5 band parametric EQ
    • Optional Spectral Signature dynamic EQ
    • Optional FM Conditioner
    • Optional loudness logging software (J*AM)
    • On board interfaces: 2x AES/EBU I/O, Sync in, Sync out, 8 GPI/O
    • I/O modularity via 1 interface slot
    • Ethernet connectivity for set up and control via web browser
    • External control via network or GPI/O’s
    • Power-fail bypass relays
    • 19”, 1RU device, redundant PSU

    Versions & Options

    • D*AP4 LM: D*AP4 base unit plus LM feature set
    • X*AP RM1: hardware remote control linked via Ethernet
    • Option Board 16ch SDI I/O (3G/HD/SD)
    • Option Board 4ch analog I/O
    • Option Board 8ch analog Out
    • Option Board 8ch AES/EBU I/O
    • Option Board 16ch Dante® Audio over IP
    • Option Board 16ch MADI I/O
    • License Spectral Signature dynamic EQ
    • License FM Conditioner
    • License De-Esser


    All Jünger Loudness control / - Management devices from all product lines share a neat feature: The gathered measurement data is made available for downstream measurement applications via Ethernet. Learn more about at Measurement and Logging Software Tools.

    • Jünger Application Manager - J*AM
      System: MS Windows™
      download (ZIP, 23.4 MB)
      Changelog (2017-08-31):


      Before installing the J*AM / Loudness Logger software under Windows 10, please download and install the latest Sentinel dongle GUI runtime environment:


      Installing the J*AM / Loudness Logger software without the environment first might lead to critical errors and blues screens!


      • Fixed integration range issue in Log Analyzer


      • Fixed parameter inconsistencies occurred while network interruptions
      • Added support for C8492 PM5 and C8092 PM5
      • Added support for C8702 logger version 6


      • Added support for V*AP v2.0.1

    Product Brief



    • D*AP4 FLX / LM EDITION / EASY LOUDNESS rel_dap4_mei_4_5_6.zip download (ZIP, 32.7 MB)
      Changelog 4.5.6 (2020-11-09):

      Firmware for D*AP4 FLX and LM Edition and Easy Loudness - NOT for legacy DAP LM4!

      Changes 4.5.6:

      • changed (Dante) DT-100 firmware version to

      Changes 4.5.5:

      • changed (Dante) includes DT-100 firmware version
      • improved (Dante) Firmware based on 4.2.0 Audinate Brooklyn Firmware released
      • fixed (Dante) Dante Module display issue with long Current IP Adresses

      Changes 4.5.4:

      • changed (SDI) includes SDI firmware version 53

      Changes 4.5.3:

      • improved (Events) added power supply parameter trigger

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