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D*AP4
Introduction
The D*AP4 is a processing platform that may be bought in different versions as a 2 channel or 4 channel
processor. The D*AP4 LM is a fully featured loudness control device except EQs, Spectral Signature and FM
conditioner while the D*AP4 FLX will be tailor-made to your specification. Both devices may be upgraded
later on locally.
This manual refers to a fully featured D*AP4 LM.
The D*AP4 focuses on automatic and adaptive loudness management compliant with all current broadcast
audio loudness recommendations including ITU.1770 standards (revisions 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. The D*AP4 features loudness normalization and dynamic range processing for up to two stereo
programs of audio. Sophisticated fail-over and voice-over round off the D*AP4 feature set. Dynamic range
control and Level Magic™ are based on a unique multi-loop control principle.
LEVEL MAGICII™
The algorithm offers adaptive wideband control with exceptionally high audio quality uncompromised
loudness management without any coloration, pumping, distortion or modulation effects by combining three
major gain changing elements:
· Transient Processor
· Adaptive AGC
· Distortion-free true peak limiter
Spectral Signature™
Jünger Audio's Spectral Signature™ dynamic equalizer gives you a powerful creative tool to control the
spectral balance of your program. Spectral Signature™ analyzes incoming audio and compares its spectrum
with a predetermined reference curve. This allows dynamic EQ corrections to be applied, if necessary, to give
a consistent sound impression. Spectral Signature™ is an optional feature for the D*AP4.
FM Conditioner
A powerful option for FM broadcast and other FM applications like analog cable head ends to pre-control the
MPX power and peak deviation of a stereo FM signal, including true peak and pre-emphasis limiting.
System Integration
All system parameters are remotely accessible, allowing the unit to be integrated and remotely controlled by
broadcast control systems. This helps users to apply individual processing to their programs, which is a key
feature for well-managed loudness control.
Loudness measurement
To check compliance of programs with your local loudness regulations, the unit analyzes loudness and true
peak levels from input signals and transfers the measurement data via Ethernet to an optional measurement
and logging software anywhere in your network. These measurements can be triggered by automation
systems via GPIs, via network or even manually on the X*AP RM1 remote panel. The D*AP4 can also
generate SNMP or GPI/O alarms in case pre-determined limits are exceeded.
Web configuration
A web interface also allows easy and intuitive setup and configuration anywhere in your network.
Interfaces and system security
Audio I/Os range from onboard AES I/O to optional 3G/HD/SD-SDI I/O including video delay and analog I/O.
All combined I/O interfaces support power fail bypass relays as standard. With optional redundant PSU and
SNMP integration the unit ensures maximum operational safety.
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