APE is the Monkey's Audio format that use lossless compression algorithm. To playback APE audio files, you need to install the correct codec filter in your system. One of the most popular APE filter is RadLight APE DirectShow Filter. Follow these steps to install the RadLight APE DirectShow Filter.

1. Download RadLight APE DirectShow Filter.
2. Double click the setup file to start installing the filter.
3. Follow the on screen prompt to install the codec.
4. You can now use any DirectShow based player (such as Windows Media Player, MPC) to play APE files.
   

The filter also supports for playing .apl playlist file, making it easy to play selected sound tracks from one APE file.