DROffline MkII: Batch Loudness and DR Measurement Tool by MAAT Free Download

DROffline MkII covers the mandated R 128 and A/85 parameters, including integrated loudness, loudness range, and maximum true peak, momentary and short-term values. The developer says it also provides the official DRi dynamic range measurement, which is designed to show how much dynamic range has been reduced by heavy compression and limiting rather than to check broadcast compliance.

The app adds supplemental metrics such as Sample Peak to Short-Term Loudness Ratio (PSR), sample peak values and RMS readings. Most measurements can be broken out per channel, so left and right can be compared directly.

You can drag and drop a single file or a whole directory into the app. Measurements run in the background, so the app stays out of your way while you work in other software.

The text logs are useful as documentation for clients, distribution checks or post-production records. The file metadata section lists the file name, absolute path, format, sample rate, word length and bits used. DROffline MkII works with LPCM formats (WAV, BWF, AIFF) and lossless FLAC and ALAC files at sample rates from 44.1 to 384 kHz.