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WLM Plus Loudness Meter

Precision level measurement plugin with true peak limiter
Image for WLM Plus Loudness Meter

Measure the Perfect Levels for Streaming


It’s an audio streaming audio world—whether for music, podcasts, YouTube, games, broadcast, movie trailers, commercials, or other media. WLM Plus gives you the confidence to know your audio is fully compliant with all current ITU, EBU, and ATSC specifications, and hits crucial target levels.

WLM Plus is loaded with extras. Tweak levels, using the plugin’s precision peak limiter and gain trim. Check multiple formats, with short- and long-term readings—and even log the results.

  • Meets the critical requirements of all streaming platforms
  • True Peak readings minimize the risk of distortion from transcoding
  • Provides momentary, and short- and long-term, LUFS readings
  • LU reading gives an accurate indication of dynamic range
  • Includes True Peak limiter and gain trim for precision output control
  • Choose from 5 different momentary scales
  • Select one of 5 different weightings, or none
  • Custom high-pass and low-pass pre-filtering
Watch It in Action

The All-In-One, Professional Loudness Metering Solution

  • Complete Compliance

    WLM is fully compliant with all current loudness measurement standards: the 2nd-generation ITU-R BS.1770-3 protocol, the up-and-coming EBU R 128 standard, and ATSC A/85 for broadcast and digital television.

    Features: Glue Mixes without “Squashing”
  • Multiple Measurement Methods

    Choose from the EBU’s detailed measurement methods, the LM1 protocol that averages loudness across an entire program, or DIAL, which uses dialog as the loudness anchor for measuring and averaging loudness.

  • Measure Audio Over Time with Comprehensive Weighting

    WLM incorporates frequency weighting based on the Fletcher-Munson curve, as well as timescales (Momentary, Short Term, Integrated, or True Peak) to measure audio behavior over time.

    Features: Fast and Efficient Operation
  • No Limits—Except for Precise Limiting

    You can fix audio levels within WLM—there’s no need to go back and forth between plugins. The True Peak limiter uses Waves’ acclaimed limiting technology to tame peaks, while a Gain trim control sets the final output.

    Features: From Vocals to “The Ringo Drum Sound”
  • Presets for Common Level Requirements

    WLM includes presets that fulfill the most common post-production and content requirements. Even generate CSV log files, to document the readings of all 3 measurement methods simultaneously.

    Features: Multiple Modes Fit Different Material