Getting 5.1 on Santa Cruz
Thanks goes to No1JMV for the screen shots.
By following these simple steps below you can get not only 5.1 DVD's but also 5.1 mp3's from your Turtle Beach Santa Cruz.

Steps:
Open up your Santa Cruz control panel.

Select 6 speaker (5.1) in the speaker mode

Set the VersaJack to analog out (this will be your center/sub channel)

For 5.1 MP3's (virtual 5.1) click the button highlighted in orange.
(note: turn this off when using real multichannel audio sources)

Now your screen should look like this

Enjoy the sounds of 5.1 from your Voyetra TurtleBeach Santa Cruz!