although we do not have a complete Linux client in 14r2, we do have a plugin for Linux that allows the local audio devices to be used in TerminalServer environments.
The plugin is currently in the beta phase and it would be very nice if you can test it.
Further information can be found at https://wiki.innovaphone.com/index.php?title=Reference14r2:MyApps_Plugin_for_Virtual_Desktops#Linux

Best regards
Dennis