My favorite radio station died this week, and I didn't even notice. At 5 p.m. Wednesday, Heartbeat 106.7 FM, "The Beat of the City," switched over to a New Country format, and was re-branded as 106.7 The Ride. Anyone expecting The Isley Brothers or Bill Withers or Michael Jackson or The SOS Band will have to settle for Luke Bryan. And the format shift occurred so suddenly — with only the above message, perverse-seeming in its simplicity ("WE HAVE DECIDED TO SWITCH OUR FORMAT TO NEW COUNTRY. THANK YOU FOR LISTENING."), as explanation. A Facebook group has already been created so that old fans can vent their outrage. To find out what happened, I called 106.7's owners, Signal Media, and spoke to Mike Kennedy, program director for the new station (and for The Point 94.1).