LM5

LM5 derives statistical information from the ITU-R BS.1770 standard to visualize instant loudness and loudness history, thereby helping engineers to realize the dynamic range at their disposal during production, and to predict the dynamic range restriction needed during distribution to various platforms. LM5 is suitable for use in broadcast, post production, film and music alike.

In the radar view, LM5 displays real-time loudness (LU or LFS) and true-peak level along with loudness history. The angular, color-coded display makes it easy for an editor to balance audio visually, and to see when level falls below or exceeds the end-listener's dynamic range tolerance. The true-peak level display even warns the operator when excessive peaks are at the risk of creating distortion in downstream equipment such as data reduction codecs or DA converters. LM5 enables easy and predictable level management across distribution and broadcast platforms with or without the use of metadata. In either case, the meter can help improve speech intelligibility and reduce level jumps on all platforms from MobileTV to HDTV using AAC or Dolby AC3.