Hacker News
Audacity 4.0 Ships Today, Rebuilt on Qt With Clip-Based Editing and a New .aup4 Format
The GitHub API records the Audacity-4.0.0 tag published 2026-09-03T10:19:48Z, a full rewrite of the UI on Qt with native high-DPI support, customizable workspaces, light/dark/high-contrast themes and a recent-projects home screen. Editing moves to a clip-based model with multi-clip selection, grouping and an S-key split tool, alongside seekable playback, recording at any timeline position, live meters in track headers, and ASIO support in Windows builds. Projects move to .aup4 with automatic conversion from .aup3, but Time Tracks, MIDI, the Mixer and Play-at-speed are all missing from 4.0.
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