Cool Man

The Cincinnati Public Library has a short jazz concert once a month during the winter and I've been able to make few of them. I know very little about jazz. Okay, I know nuttin' 'bout jazz. Except for the Charlie Brown Theme. I'm not hip or cool enough (if there such things) to get it, but looking around the audience, I fit right in. The interesting thing was it appeared to be a melee of beats and a cacophony of sound, but they all still hit on the 2 and the 4. Or is it the 1 and the 3 in jazz?