The thing I like about Web Audio Creator is the choice of
5 background music tracks you can select before recording your voice. You
can also add your own wav files to the background music library.
After you have recorded your track you then need to upload
the wacplayer0.swf (which contains the buttons) as well as the mp3 file.
There is no choice of buttons only the blue square button
as below.
Web Audio Creator is one of the easiest products to use
and great if you need to quickly record your voice with a backing track.