The D*AP8 TAP 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.
The D*AP8 TAP audio processor features loudness control plus dynamic range processing for up to eight channels of audio (4x2, or 5.1+2). Optional audio decoding and encoding (Dolby® E, Dolby® Digital Plus, Dolby® Digital or AAC, HE-AAC v1/2) including metadata management are also provided, along with 5.1 downmix and upmix features, sophisticated fail over and voice over systems.
- 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
- Spectral Signature dynamic EQ
- 5 band parametric EQ
- Dynamics with compressor and expander/gate
- Surround Upmix functionality
- Fail over with signal loss detection and automatic Upmix
- Voice Over functionality
- Optional audio encoding and decoding: Dolby® Digital Plus, Dolby® Digital, Dolby® E, Pro Logic II, AAC, HE-AAC v1/2
- Dolby® Metadata generation, processing and emulation
- Optional loudness logging software (J*AM)
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 combines three major gain changing elements:
- Adaptive AGC
- Transient Processor
- Distortion-free true peak limiter
The adaptive dynamic section includes an expander and upward compressor.
Jünger Audio’s 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. Spectral Signature is a standard feature on the D*AP8 TAP.
Loudness Measurement and Logging
To check compliance with local regulations, loudness and true peak levels can be measured and transferred via Ethernet to the optional J*AM measurement and logging 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 can rebuild the original plot for easy readout of historical measurements.
Stereo to 5.1 Upmixing
When broadcasting a mix of stereo and 5.1 audio content, it can be disturbing to viewers when the surround field collapses back to stereo and vice-versa. The unit can be set to detect stereo only content and automatically upmix to 5.1 in order to maintain a constant surround experience. Existing 5.1 content will pass untouched.
All system parameters are remotely accessible allowing the unit to be integrated and remotely operated by broadcast control systems. An advanced built-in Event Management tool allows the remote loading of parameter presets either by hotkeys on the optional X*AP RM1 remote panel, by 8 onboard GPI/O’s or even 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.
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 in minutes. On screen metering and measurements are available for easy reference and a dedicated “mobile” UI is aimed specifically at smaller displays such as tablets or smartphones.
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 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.