Configuring audio for user sessions
If William disables audio for a published application, then audio will not be available within the application under any condition. If he enables audio for an application, then he can use policy settings to set the conditions where audio is available within the application.
In the Citrix AppCenter Console (or Citrix Delivery Services Console in XenApp 6.0), William needs to select the published application for which he wants to enable or disable audio and select it from Action | Application Properties.
In the Application Properties dialog box, he clicks on Advanced | Client options.
Then he checks or clears the Enable legacy audio checkbox.