Audacity 4.0, the latest version of the widely used free and open-source audio editing software, was released today with a redesigned interface and a host of new features. This update marks the largest feature addition in years, following the release of Version 3.0 over five years ago, which sparked considerable discussion among users. The new version includes a dark mode and a more colorful interface, with features such as colored audio clips and vibrant accent colors on elements like gain sliders. For those who prefer the classic look, the setup process allows users to retain the older design. Among the new editing workflows is an expansion of non-destructive editing features first introduced in Version 3.2. Users can now overlap audio clips, and if they trim too much, the previously covered audio will still be accessible. Multiple clips can be selected and trimmed simultaneously by dragging a single handle, and they can be grouped for more complex editing tasks. A new envelope tool has been added, similar to automation features found in professional software like Ableton Live or ProTools. This allows users to create draggable control points for adjustments like volume changes. Waveforms will now update in real-time on-screen, and a new splitting tool enables one-click clip cutting, similar to features in other creative software. Audacity 4.0 now allows users to edit audio down to the individual sample level by zooming in sufficiently on a clip, which is particularly useful for making precise micro-adjustments. Each track also includes a meter to help users identify which tracks might be causing clipping in the mix. The removal of the sync-lock feature, which previously allowed multiple clips to be edited together, may be controversial. However, new keyboard shortcuts have been introduced to replicate this functionality. The update also improves plugin support, making it easier to integrate third-party audio processing tools. Additional details about the release, including a breakdown of all the new features, are available on the official Audacity 4.0 webpage and in an accompanying YouTube video. This update reflects the ongoing development and commitment to improving the software for both casual users and audio professionals.