Youlean – Loudness Meter Ultra v2.5.15 STANDALONE, VST, VST3, AAX for Windows

• Multi-Standard Compliance: Fully compliant with ITU-R BS.1770-4, EBU R128, ATSC A/85, OP-59, ARIB TR-B32, and AGCOM 219/09/CSP.
• Dedicated Streaming Target Presets: One-click calibrated targets for Spotify, Apple Music, YouTube, Tidal, Amazon Music, Deezer, and Netflix (Dialogue LRA & Gated Loudness).
• Comprehensive Metering Engine: Real-time measurement of Integrated Loudness (LUFS), Short-Term (3-second sliding window), Momentary (400 ms window), True Peak (oversampled ISP detection), Peak-to-Short-Term Ratio (PSR), and Dynamic Range.
• Real-Time Visual Graph & Histogram: Continuously scrolling timeline history plotting loudness and dynamic movement, paired with a statistical distribution histogram.
• Multi-Channel & Surround Support: Accurate metering for Mono, Stereo, and multichannel surround formats up to 5.1 and 7.1 configurations.
• Drag-and-Drop Offline File Analysis: Drop audio files (WAV, MP3, FLAC, OGG, AIFF) straight onto the interface for instant whole-file analysis without real-time playback.
• Automated Target Normalization: Normalize analyzed files directly to a designated target LUFS or True Peak ceiling.
• Professional Reporting & Export: Export detailed compliance reports in PDF format, alongside CSV data logs and high-resolution PNG graphs for delivery verification.
• Command Line Interface (ylm2): Standalone CLI utility for integrating automated loudness analysis, target checking, and normalization into server backend pipelines and shell scripts.

Version 2.5.15 (2026-09-28):

• Fixed an issue causing intermittent audio glitching and GUI stuttering when hosting the AAX plugin inside Avid Pro Tools.

Version 2.5.14:

• Resolved an issue causing incorrect update notifications to display.
• Fixed severe UI latency, rendering delays, and frame drops occurring on specific Windows GPU/display configurations.

Version 2.5.13:

• Fixed a bug where the "Update all presets" routine failed under certain directory permissions.
• Dropped legacy 32-bit Windows plugin binaries.
• Introduced native Windows ARM64 binary support (Standalone, VST, and VST3; AAX pending Avid platform availability).
• Measurements now automatically reset upon host transport loop restart (can be toggled in Advanced Settings).
• Reduced compiled binary footprint via font subsystem refactoring.
• Operating system native fonts are now used by default for Japanese, Korean, Arabic, Thai, and Simplified Chinese character sets.
• Embedded backup fonts now load into memory on-demand only when an unmapped glyph is encountered, substantially reducing background RAM usage.
• General stability improvements and internal DSP maintenance fixes.

1. Loudness & Dynamics Monitoring:

   • Integrated LUFS: Tracks overall program loudness from transport start to finish, using standard gating algorithms (-70 LKFS absolute, -10 LU relative).
   • Short-Term & Momentary: Visualizes immediate energy spikes and passage dynamics to maintain consistent listener comfort.
   • True Peak Metering: Employs 4x oversampling interpolation to expose inter-sample peaks that slip past conventional sample-peak meters, preventing digital clipping on DACs and lossy encoder transcode stages (MP3/AAC).

2. Standalone App & Background System Audio Monitoring:

   • Operates independently of any DAW host.
   • Route system audio directly into the standalone application via virtual audio cables to monitor web browsers, streaming players, or media software.

3. Batch Analysis & Normalization:

   • Process multiple audio tracks simultaneously.
   • Apply batch gain offsets to normalize an entire album or podcast series to a uniform loudness standard.

4. Scriptable Automation via ylm2 CLI:

   • Execute headless loudness analysis from Windows Command Prompt or PowerShell.
   • Output structured JSON or CSV data logs for automated QA pipelines in broadcast networks or mastering houses.

• Binary Architecture: Native 64-bit Windows (x64 and ARM64)
• Plugin Formats: VST2, VST3, AAX Native, Standalone application
• Audio Processing: 64-bit floating-point DSP precision
• Sample Rate Support: 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz, up to 384 kHz

Supported Digital Audio Workstations & NLEs:

• Avid Pro Tools (AAX Native 64-bit)
• Steinberg Cubase / Nuendo
• Image-Line FL Studio
• Ableton Live
• PreSonus Studio One
• Cockos REAPER
• Bitwig Studio
• Adobe Premiere Pro & Audition
• Blackmagic Design DaVinci Resolve & Fairlight

Installation Steps:

1. Host Preparation:

   • Close all active DAWs, video editing software, and audio host applications.

2. Run Installer:

   • Run the setup installer as Administrator (Right-click -> Run as administrator).
   • Choose your preferred components:
     • Standalone Application
     • VST / VST3 Plugin
     • AAX Plugin (for Pro Tools)
     • Command Line Tool (ylm2)
   • Complete the setup wizard.

3. Verify Installation:

   • The binaries are pre-cured; no serial keys, account registrations, or challenge-response authorizations are required.
   • Launch your DAW or run the Standalone application from the Start Menu to confirm immediate full Ultra functionality.