The Chicago Symphony first broadcast on the radio in 1925. Though often sporadic, there have been broadcasts ever since. With the 1965–1966 season, Chicago radio station WFMT began regular tape-delayed stereo broadcasts of CSO concerts, running through the 1968–1969 season. They resumed from 1976 through the 2000–2001 season before ceasing due to lack of sponsorship. In 2007, the broadcasts once again resumed with a 52-week series. The broadcasts were originally sponsored by BP and air on 98.7 WFMT in Chicago and the WFMT Radio Network. They consist of 39 weeks of recordings of live concerts, as well as highlights from the CSO's vast discography.