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A 2-channel audio level controller compliant with all current broadcast loudness recommendations including ITU, EBU R128 and ATSC A/85. Based on the T*AP, the D*AP LM2 is a replacement for the D06 and incorporates Version 2 of Jünger’s Level Magic algorithm, in addition to a suite of dynamics processors specifically designed for broadcast applications. It removes all undesired loudness changes in programme level, especially when switching between sources, and does so without adding any colouration, pumping, distortion or modulation effects to the programme material. Rack-mounting (1U).
EBU-TECH 3344 - October 2011
EBU-TECH 3343 - August 2011
Loudness normalisation and permitted maximum level of audio levels - August 2011
Like its predecessor, the Model D06, the Jünger Audio D*AP LM2 broadcast audio processor addresses a common problem faced by many broadcasters - significant changes of loudness occurring when switching between programme sources. Sometimes these changes can be very dramatic (especially during unattended operation). Using Version 2 of Jünger’s Level Magic™ adaptive loudness algorithm, the LM2 processes audio content to ensure that program levels remain within predetermined tolerances without any colouration, pumping, breathing, distortion or modulation artefacts, no matter which programme source is selected. Level Magic? runs in the on-board DSP core, together with Filter, Compressor and Expander functions. Up to 2 seconds of delay may be inserted per-channel. An optional Spectral Signature feature analyses programme for spectral content and ensures that the overall audio character remains constant regardless of source.
The LM2 is fully compliant with all current loudness recommendations for broadcast audio, including EBU R128, ITU.1770-2 and ATSC A/85.
Designed for ease of use, the LM2 provides an intuitive front-panel interface enabling fast and accurate configuration for stand-alone operation. It can be implemented at any workflow stage: acquisition, outside broadcast, post-production or transmission, and can be remotely controlled from a standard web browser via Ethernet, or from third-party equipment via RS-232C. Hard relay bypass guarantees against loss of audio in the event of power failure.
Standard I/O connectivity is AES3 and analogue; all I/O is on XLRs. Sample Rate Conversion is standard, and can accommodate all sample rates between 32 and 192 kHz. To enable transparency to Dolby® E and Dolby® Digital bitstreams the LM2’s SRC’s can be bypassed (locally or remotely).