Monkey's Audio is a fast and easy way to compress digital music. Unlike traditional methods such as mp3, ogg, or lqt that permanently discard quality to save space, Monkey's Audio only makes perfect , bit-for-bit copies of your music.

That means it always sounds perfect exactly the same as the original. Even though the sound is perfect, it still saves a lot of space. (think of it as a beefed-up Winzip for your music) The other great thing is that you can always decompress your Monkey's Audio files back to the exact, original files. That way, you'll never have to recopy your CD collection to switch formats, and you'll always be able to recreate the original music CD if something ever happens to yours.

Features of Monkey's Audio :

- Efficient (fast and great compression) – Monkey's Audio is highly optimized and highly efficient
- Perfect sound – absolutely no quality loss, meaning it sounds perfect and decompresses perfect (it's lossless!)
- Media Center, Winamp, and more support – supported by many popular players and rippers
- Easy – the Windows environment interface is both powerful and easy to use
- Free – Monkey’s Audio is completely free!
- Error detection – Monkey’s Audio incorporates redundant CRC’s to ensure proper decompression of data (errors never go unnoticed)
- Tagging support – Monkey’s Audio uses its own extremely flexible APE Tags so you can easily manage and catalogue your Monkey’s Audio collection.
- External coder support - you can use Monkey's Audio as a front-end for all of your encoding needs
- Freely available source code, simple SDK and non-restrictive licensing - other developers can easily use Monkey's Audio in their own programs -- and there are no evil restrictive licensing agreements

Changes in Monkey's Audio 4.01 beta 2 :

- Fixed: File > Exit would not close the program.
- Fixed: Typo on the options dialog "Leave source file intact" option.
- Fixed: APX files that weren't NULL terminated could cause a crash.
- Fixed: Files that were skipped would show "Error" instead of "Skipped" in the status column.
- Changed: Improved the error reporting in the status column after a failure.
- Fixed: Possible small memory leak (100 bytes) on missing file decompression / conversion errors.
- Changed: Increased the statusbar size to better hold batches of 100+ GBs of files.
- Changed: The file list will scroll to show newly started files during processing.
- Fixed: Adding or removing files from the file list is no longer allowed during processing.
- Changed: Pausing processing no longer distorts the time estimation.
- Fixed: Some operations would not pause properly. (external encoders, etc.)
- Fixed: The list control would flicker more than necessary when working with long lists of files.

Changes in Monkey's Audio 3.99 :

- Changed: Decoding engine better at handling corrupt streams / loss of internet connection while playing.
- Changed: Simplified assembly code building for 3rd party developers.
- NEW: Improved entropy coder for increased compression.
- Changed: Removed RKAU support. (since it is no longer commonly used)