While redesigning my portfolio site at johnkeston.com I decided to research some of the latest audio plugins for WordPress. Prior to today I was using a fork of Audio Player called Anarchy Media Player (AMP), which was nice for several reasons. One being that it automatically converts MP3 links to the player in posts. Unfortunately the player has not been updated in sometime and after upgrading the the most recent version of WordPress the admin panel for AMP stopped working properly, forcing me to hack my wp-options table.
SoundManager 2 is what’s used by mix sharing sites like SoundCloud and 8tracks. I have yet to find any difficulties, other than some alignment issues that I was able to resolve via CSS. Here’s an example of the player in use. Please comment on how it works for you.