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100. 7 began HD Radio operations in 2006.

100. 7 HD-1 carried the standard analog format, while 100. 7 HD-2 carried a 1980's / 1990's hits format dubbed the " 80's / 90's Flashback Channel " ( named after their popular " Flashback Friday " program at the time ).

When the station rebranded as " 100. 7 Star " in October 2011, the HD-2 channel shifted its format to include 2000's hits, and was renamed " Replay Radio ", which includes heavy references to former sister station B94.

WBZZ added an HD3 channel in August 2012, carrying CBS Radio's alternative-talk format, branded as " The Sky.

" The Sky is also carried on Detroit's WOMC-HD3, Seattle's KMPS-HD3, and Boston's WBMX-HD3.