Could that explain the DTMF-sounding tones between programming and the commercials?
Could this let local stations insert their commercials? Is there a name or designation for this method?
yep pretty much...I know a sports feed I watch the right channel is for the cue tones. Since its part time it allows the cable companies that share a channel with that station cue it up so when the tones are heard it flips to that sports feed...when they play them after the game I assume its to change back
here is the example from the teams website
Left Channel - Mono Program Audio
Right Channel - Cue tones ONLY
Markets with WDAZ 102* - ON
Markets with WDAZ 102# - OFF
Markets without WDAZ 063* - ON
Markets without WDAZ 063# - OFF