Warren, I believe the frequency tone sweep was purposely used to find the system frequency bandwidth potential. It can also be use to find peak and dips in a speaker and room. I used to have a cleaning disc that had this tone sweep and many other useful tracks. One of the tracks had two 60 hz tone bursts which suppost to help eliminate static residue in the circuitboard. I see some improvement in the background but not dramatic.
thanks
Alfredo
thanks
Alfredo