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Born this day: April 7, 1915 - Iconic jazz vocalist/songwriter Billie Holiday (born Eleanora Harris in Philadelphia, PA). Happy Birthday to "Lady Day" on what would have been her 99th Birthday.
On this day in music history: April 7, 1967 - FM Underground radio is launched at KMPX 106.9 in San Francisco. Having grown tired of the grind of AM Top 40 radio, broadcasting legend DJ Tom Donahue, who will pioneer the free-form album rock radio format that puts the focus on rock album cuts rather than the tight and often restrictive Top 40 pop formatting that plays strictly hit singles. KMPX will broadcast from a studio at 50 Green Street in San Francisco's North Beach district. The station will both change the face of commercial radio and be instrumental in breaking new artists like Jefferson Airplane, Grateful Dead, and Jimi Hendrix. However, Donahue's time at the station will last less than a year. Splitting his time between the San Francisco station and sister station KPPC in Pasadena, the strain of working both stations will cause the veteran DJ/Program Director's relationship with owner Leon Crosby to breakdown, leading to Donahue's ouster from the station. In a show of solidarity, the staff of KMPX will strike after Crosby replaces Donahue with Bob Prescott as PD. The strike will last for eight weeks, in which time Crosby will fire all of the original staff and replace them with DJ's mined from other stations around the country. Upset by what has transpired, a number of prominent rock musicians including The Grateful Dead and The Rolling Stones will ask KMPX to refrain from playing their music as a show of support for the deposed station workers. By May of 1968, Tom Donahue and several former KMPX staffers will be working at rival station KSAN (owned by Metromedia Broadcasting).