Maybe they think the WYSF calls are too familiar with the audience as an unpopular radio station. Maybe they think the calls are jinxed. Maybe they want to just start clean with new calls, new station, new format all around. Calls don't always match what the station is called. There are TONS of examples of stations where the calls have nothing to do with the name of the station. Aside from the call letter change, lets get back to the format discussion. If they were to flip to a CHR/Rhythmic or Urban type format, why do they think it would beat the station with a much stronger signal in Birmingham, 95.7 Jamz? Why put it on the weaker signal and compete with stronger signal competition? Will Citadel try moving 100.5 into Birmingham and dropping the power like 95.7 did? Then again, the urban audience in Birmingham may be so tired of 95-7 Jamz that they might listen to it more even if it is a weaker signal.