The +LP Loudness Processing option is available for numerous Cobalt® cards. It's also available as a purchased field-installed licensable feature upload. Using Linear Acoustic® AERO MAX® technology, loudness control is applied on up to six channels of audio from any audio inputs sourced by the host card. AEROMAX® algorithms use a sophisticated multiband approach to loudness processing. These algorithms can apply multi-faceted loudness correction specifically targeted to various frequency ranges and other characteristics within the program material, resulting in audio free from abrupt loudness or image shifts while preserving more of the original content than available using less refined approaches. Because +LP processes audio loudness locally and in sync with the video, loudness is processed without the large accumulated latency delay found in other loudness processors.
The loudness processor function receives up to six selected channels from the internal bus and performs ITU BS.1770 – ATSC A/85 loudness processing on the selected channels. A loudness processing profile best suited for the program material can be selected from several loudness processing presets. The loudness processor has a default target loudness of -24 LKFS. A Custom Preset user interface page allows detailed manipulation of various parametric factors that comprise each of the factory preset profiles, thereby allowing user “tweaking” of the loudness processing actions to suit individual preferences. Loudness processing options are available on a wide range of Cobalt cards.