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Metering by MAAT

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MAAT’s DROffline is the batch measurement companion application to our official DRMeter real-time DR estimator plug-in.

Truly the Only Way to Measure DR

MAAT’s DROffline batch measurement app is the only software that generates official DR readings. Offering essential options for musically justified, file-based metering, DROffline includes DR dynamic range, SPPM Peak and RMS amplitude. One file can be evaluated, or an entire directory can be measured in batch mode.

What is DR?

The DR algorithm, akin to PLR (Peak–to–Loudness Ratio) or “crest factor,” specifically measures the dynamic density or lack of dynamics caused by overly aggressive dynamic compression and limiting. Although the companion DRMeter provides an estimate of the "official" DR Value, only the DROffline utility can generate official values, which are cumulative over the entire length of a song. Only DROffline can scrub through an entire song or track, resulting in an official DR number. 
The complete DR metering system, composed of the real-time DRMeter plus the DROffline batch processor, was created by Friedemann Tischmeyer to address the need to generate a repeatable, easy to understand numeric value. Seeing a meaningful and easy to understand indication of dynamic range inspires users to back away from hyper-compression.

Not Only the Doctor has a Companion

The MAAT DROffline release is MAAT’s second step in bringing forward the legacy of the PMF’s legendary TT Dynamic Range metering system, which was certainly the most popular metering plugin of the last decade. DROffline has to be modernized to work with current version of Windows and macOS operating systems. 
The companion DRMeter is a plug-in that generates approximate DR values when applied to the loudest passages in a track. Due to its real-time operation, it cannot measure official DR values, but it can estimate DR while you work.

Features & Specifications:

  • Official DR
  • SPPM
  • RMS
  • File/Batch Process

Supported Formats:

  • 24-bit WAV, AIFF & FLAC file types.
  • Sample rates from 44.1 to 384 kHz.

System Requirements


  • macOS 10.8 and newer, 64 bit only


  • Windows 7 and newer, 32 & 64 bit.

Important Note: This product is available in Standalone format only.

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