What is "wyin"

WYIN, virtual channel 56 ( UHF digital channel 17), is a PBS member television station located in Gary, Indiana, United States. The station is owned by Northwest Indiana Public Broadcasting, Inc., and is a sister station to NPR radio outlet WLPR-FM (89.1 FM). The two stations share studio facilities located on Indiana Place (Mississippi Street) in Merrillville; WYIN maintains transmitter facilities located near Lake Dalecarlia (due south of Cedar Lake). WYIN is one of three PBS member stations serving the Chicago television market, alongside Chicago- licensed WTTW (channel 11) and WYCC (channel 20).