New features

• New Welcome Screen with introduction to Audacity.
• Enhanced Windows Shell integration, so Audacity shows up in lots of Windows places such as "Open With".
• New keyboard command: 'Mix and Render to New Track' (bound to Ctrl+Shift+M).
• New keyboard shortcut: "Shift-A" starts playback when stopped, or performs "Stop and Select" when playing.
• Added support for VAMP audio analysis plug-ins.
• Solo button solos only one track at a time, and a track cannot be both mute and solo.

Interface

• Keyboard shortcuts for making short/long jumps along the timeline.
• Added 'Snap To' in the Selection Bar.
• Made keyboard navigation easier when multiple menu items with the same first letter exist.
• Enhanced interface for label editing.
• Layout of OK/Cancel buttons consistency improved.

Preferences:

• "Select all audio in project, if none selected" (on by default).
• "Beep on completion of longer activities" (system bell, not main output).
• Other preferences cleaned up and explanations improved.
• Envelopes: Many fixes when copying / pasting / repeating.
• Many translation updates.
• Track height fixed in several cases.
• CleanSpeech mode switching without closing and re-opening fixed.

Opening/Saving Formats

• Metadata editor added for OGG, FLAC and WAV/AIFF exports, and general improvements.
• Metadata import improved.
• Muted tracks are no longer audible in the exported mix.

Effects

• Truncate Silence: support for multiple and stereo tracks.
• Dtmf Generator:
• Added support for keypad letters.
• Added an amplitude control.
• Compressor: variable decay time added.
• Equalization:
• Clicks at start / end prevented.
• Improvements to saved curves being found.
• Preview works correctly.
• 'Merge' command appears in Undo history.
• Clipping detected more reliably.
• Nyquist plug-ins reviewed and enhanced.
• Better (and more) progress bars.
• Canceling effect always restores previous audio.
• Several improvement to effects in batch mode.

Recording/Playback

• Improvements to latency correction.
• Updated version of portaudio-v19 library.