# FREE: Online AI mastering and XanTimeQ equalizer plugin by Capter Audio

> Source: <https://rekkerd.org/free-online-ai-mastering-and-xantimeq-equalizer-plugin-by-capter-audio/>
> Published: 2026-09-23 08:33:22+00:00

Capter Audio has announced an update to its free browser-based AI mastering tool. Version 1.2 of the engine features sub-1.2ms real-time neural vocal tracking, phase-coherent acoustic mud removal, 38 analog saturation circuits, and client-side 4-stem demixing. Capter Master takes an uploaded WAV, MP3, FLAC, AIFF, or M4A file and processes it through a Mid/Side-based engine [...]

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