I think you are having a nice dream. Though it is certainly possible to multiplex channel or other data into the audio (in fact I have set up remote repeater input voting systems that fed discriminator signal strength data via a modulated sub-audible tone carrier), I have never heard of any scanners doing it. They certainly could put a digital stream in there that would easily be filtered out of the listening audio if they wanted to, and you could doubtless filter and decode it with a sound card and suitable software, but since that would not be a widely desired consumer feature I can't imagine them adding it to a bedside clock-radio scanner. As far as I know, the only way at present is to run remote programming software such as ScanControl on a PC connected to a PC-capable scanner such as a BC 780... a combination I have used and which works extremely well. Not only can you remotely program via LAN or internet, but the program will log transmissions by frequency and time as you are dreaming.