Audacity was recently updated to v2.1.1 for Windows, Mac OS X and Linux.
- The most visible new feature is scrubbing and seeking, including backwards play. Updates to Quick-Play also help with finding a precise position in the audio.
- You can now install plug-ins without restarting Audacity or add and remove any effect or generator from the menus.
- Over 50 bugs have been addressed with this release. Edits are now processed much faster in longer projects of a few hours duration.
- Effects now have presets. A new Limiter replaces the Hard Limiter effect. There's a new version of Vocal Removal, a cross-fade effect for combining clips on the same track and 'classic filters' available as an opt-in effect.
There's also been lots of work behind the scenes, including VI usability enhancements and upgrade to new libraries.
Fuller details on the changes since 2.1.0 can be found in the 2.1.1 Release Notes.