The North American transition to digital TV also had another little oddity. Analog TV channel 6's audio signal was placed in such a way that some FM receivers (

The North American transition to digital TV also had another little oddity. Analog TV channel 6's audio signal was placed in such a way that some FM receivers (with analog tuners) could tune into its audio at the edge of the dial. A station that broadcast an analog TV signal on channel 6 in Chicago (to direct viewers to rescan/get a digital tuner) put music on the audio, and newer tuners have had the FM band extended to cover this signal. It's labeled "87.7" on digital tuners but if you tune it on an SDR it's actually 87.75 MHz.