There is no additional software for your speaker system I went to logitechs website and checked for you. Here is their link to your speakers either click on the link I am sending you or copy and paste it into your web browser.
http://www.logitech.com/en-us/439/4251?section=downloads&WT.ac=sc'downloads''dd
Your only adjustment to your speakers is if you right click on the speaker and choose what you want to adjust from the pop up menu that comes up.
I hope this helps you out if it did please leave me a Yes that you were helped. Thank you
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