Ex Falso

A GTK‑based application written in Python that provides a dedicated interface for editing audio metadata. It relies on the same tag‑editing back‑end as the Quod Libet player, allowing users to view and modify any tags stored in supported audio files. The editor works with a wide range of formats and includes features such as Unicode handling, ReplayGain support, and album‑art management.

Designed for users who prefer to keep their existing playback setup, the program does not include an audio player component. It focuses solely on batch and individual tag operations, including the ability to create and edit playlists through regular‑expression or standard searches. The software can handle large music collections, scaling to tens of thousands of tracks without performance degradation.

Targeted at music enthusiasts, collectors, and anyone needing precise control over file metadata on macOS, the tool offers a stable, mature solution for organizing and correcting tag information across diverse audio libraries.