Waves WLM Plus Loudness Meter

Waves WLM Plus Loudness Meter - Loudness Meter Plugin | Precision Loudness Monitoring, Set Broadcast-Level Standards for Your Audio

In today's era dominated by audio streaming, ensuring loudness consistency and compliance for audio content—whether it's music, podcasts, YouTube videos, games, broadcast programs, movie trailers, or commercials—has become an indispensable professional standard. The Waves WLM Plus Loudness Meter is a precision tool designed for this very purpose. It allows you to confidently verify that your audio work fully complies with all current ITU, EBU, and ATSC specifications, and precisely meets target loudness levels, preventing your audio from being suppressed by platforms or creating a poor listener experience due to inconsistent volume.

The WLM Plus is more than just a simple loudness metering tool; it integrates powerful additional features to make your workflow smoother and more efficient. You can directly use its precision Peak Limiter and Gain Trim functions within the plugin to correct volume, eliminating the need to switch back and forth between multiple plugins. Furthermore, it supports real-time monitoring in various formats, provides short-term and long-term reading analysis, and can even log and export measurement results as log files, offering the most reliable data support and broadcast standard compliance guarantee for your post-production.

Core Advantages & Application Scenarios

Full Compliance with International Standards
The WLM Plus strictly adheres to and fully complies with all current mainstream loudness measurement standards, including the second-generation ITU-R BS.1770-3 protocol, the European Broadcasting Union (EBU) R 128 standard, and the ATSC A/85 specification for broadcast and digital television. This means that no matter which platform you publish to, your work will meet its stringent technical requirements.

Diverse Measurement Methods
The plugin offers a variety of industry-recognized measurement methods to meet different needs. You can choose the detailed EBU measurement mode or use the LM1 protocol to calculate the average loudness of an entire program. Additionally, it supports DIAL (Dialog Anchor Loudness) mode, a method particularly suited for film and television content, which uses dialogue as the loudness anchor for measurement and averaging to ensure vocal clarity and consistency.

Precise Long-Term Audio Behavior Analysis
The WLM Plus employs a frequency-weighting algorithm based on the Fletcher-Munson curve, which more closely aligns with the actual hearing perception of the human ear. At the same time, it combines multiple timescales (Momentary, Short Term, Integrated, and True Peak), allowing you to comprehensively analyze the dynamic behavior of your audio across different time dimensions and make the most accurate judgments.

Built-in Precision Limiter & Gain Adjustment
You can complete volume correction without ever leaving the WLM Plus interface. The plugin includes a True Peak limiter featuring Waves' industry-renowned limiter technology, which effectively suppresses and tames any excessive audio peaks to prevent digital clipping distortion. Meanwhile, the Gain trim control allows you to easily set the final output level, completing your loudness management in one stop.

Rich Presets & Log Export Functionality
To accelerate your workflow, the WLM Plus comes with a variety of built-in presets covering the loudness requirements of the most common post-production and content delivery platforms. More importantly, you can simultaneously log readings from three measurement methods and generate them as a CSV log file, providing complete data documentation for your project delivery and meeting the strictest archiving and acceptance standards.

Tech Specs

• Plugin Type: Loudness Meter & Correction
• Supported Loudness Standards: ITU-R BS.1770-3, EBU R 128, ATSC A/85
• Measurement Methods: EBU (Detailed Mode), LM1 (Program Average), DIAL (Dialogue Anchor)
• Timescales: Momentary, Short Term, Integrated, True Peak
• Frequency Weighting: Based on Fletcher-Munson curve
• Built-in Processors: True Peak Limiter, Gain Trim Control
• Logging Function: Can generate and export CSV format log files
• Applications: Music Streaming, Podcast Production, YouTube Content Creation, Game Audio Design, Broadcast & TV Post-Production, Movie Trailers, Commercial Mixing