WordPress.org

You should really use the plugin browser and installer built into your WordPress admin panel. But you can do it the old way:

1. Upload the /playpress/ directory to the /wp-content/plugins/ directory
2. Activate the plugin through the 'Plugins' menu in WordPress

For optimal results, place a copy of htaccess.txt wherever you will be hosting audio files, and rename this .htaccess.

Now enjoy using the shortcode syntax in your posts and pages:

[audio mp3="http://example.com/bells.mp3" ogg="http://example.com/bells.ogg" title="Winnie the Pooh" artist="AA Milne"]  

[audio mp3="http://example.com/bells.mp3"]