Audio Quality Server Side Policy Takes Precdence?

Hello there I was reading the following article:

http://social.technet.microsoft.com/Forums/windowsserver/en-US/36a6275f-a56f-4a01-a2d9-df44a777a682/streaming-audio-performance?forum=winserverTS

Where Dollar Wang provided an answer on Audio Quality settings. In his answer he stated that if you are going to set the audio quality it must be set on the server and client sides in order to work. What I am trying to understand what happens if we just set this on the server side only, or client side only what would be the expected outcomes?

We are hoping to be able to set policies on the server side and essentially force everyone to Medium quality without having to change RDP files; however I don't know if this will work or not.

Thanks for the answers and hope to hear from a few of you!