YouTube Volume Normalizer by むらひと

YouTube Volume Normalizer is an advanced audio processor that automatically adjusts YouTube's volume to consistently provide the optimal listening experience.

It unifies the widely varying volume levels of different videos to -14 LUFS, the broadcasting industry's loudness standard. You will no longer be surprised by overly loud videos or need to constantly turn up the volume to hear whispers.

[Key Features]

• High-Precision Auto Gain Control (AGC):
  Smoothly adjusts to the target volume regardless of the input level. You can choose from three algorithms based on your preference:
  • Digital (Standard): Transparent and fast control that preserves the dynamics of classical music and dynamic content (Tisserand Algorithm).
  • WDRC (Speech): Hearing aid technology-based control focused on maximizing the intelligibility of human voices (Sokolova Algorithm).
  • Analog (Vintage): Provides natural and musical fluctuation akin to classic optical compressors like the LA-2A (Yu Algorithm).
• ISO 226:2023 Loudness Compensation:
  Based on the latest equal-loudness contour standards, it automatically compensates for the low and high frequencies that become harder to hear at lower volumes. Enjoy a rich, full-bodied sound balance even during late-night, low-volume listening.
• Professional-Grade Signal Processing:
  • WebAssembly (Wasm): All audio processing is strictly performed in double-precision floating-point format (f64), ensuring pristine, lossless sound quality.
  • ADAA Limiter: Employs 2x oversampling and 2nd-order ADAA (Antiderivative Antialiasing) technology. It thoroughly eliminates unpleasant digital clipping and aliasing distortion, even during sudden loud peaks.
• Native Usability:
  Easily toggle the effect and access advanced settings with a single click via a seamlessly integrated button directly on the YouTube player.