I'm not sure if that actual issue has been address and if it was something that really needed addressing. In all reality, the fan on this controller is relatively quiet and I have not heard of many issues where it was a concern. Unless you have this system controller set in a position that requires absolute quiet like an office or recording studio, it should not be an issue.
I have not heard the sound in question, in person. Only a recording, so I cannot accurately judge based on that. I can tell you that a few of my fellow employees have this system installed and have not had any issues or complaints regarding the fan noise.
If you have any other questions, please let me know.