Audacity® is free, open source software for recording and editing sounds. It is available for Mac OS X, Microsoft Windows, GNU/Linux, and other operating systems.

Changelog:

Improvements and new features

• F11 Full Screen mode
• High-quality "Sliding Time Scale/Pitch Shift" effect
• "Audio Contrast Analyzer" for testing audio on the internet for WCAG2 accessibility compliance
• On Windows, sound devices can now be opened using the more efficient DirectSound API
• As a first step towards improving latency correction, a fixed rather than variable correction is now applied, customizable in Preferences
• Numerous minor interface improvements such as Metadata Editor navigation, new "hh:mm:ss + hundredths" selection format

Numerous usability and stability fixes

Cross-platform Bug Fixes:

• Muting/soloing caused incorrect channel results in exported stereo files
• Nyquist effects: pasted unmodified audio into the result, no progress bar, truncation of processed audio on cancel
• Noise Removal: pasted unmodified audio into the result, unwanted filtering tail
• Uncompressed exports:
  • Export as WAV could be corrupted if overwriting to same file
  • Export multiple to uncompressed formats only produced 16-bit WAV
• Compressed exports:
  • MP3 exports now produce correct bit rate mode, quality and length, with improved metadata visibility in player applications (Windows users will require the latest version of the LAME encoder)
  • WMA exports containing metadata are now correct
• Restored support for multi-channel recording devices that can record more than two channels using Audacity

Platform-specific Bug Fixes:

• Windows Vista: fixed crash opening Preferences with no sound devices enabled and connected
• Mac OS X and Linux:
  • fixes for spurious clipping, label typing, no shortcuts after running effects
  • project rate now always changes to respect that of first imported file
• Mac OS X only:
  • fixes for inactive or corrupted menus, hidden dialogues, portable settings not detected, and inability to set independent Command and Control shortcuts
  • FFmpeg installer now available

Program Information Category: Multimedia Type: Free Version: 1.3.7 beta Size: 4.1MB Works on: Windows, Mac, Linux Product page: here