[Maine-birds] song id

Hi folks,

   Have been searching for a song I heard earlier today in Scarborough. It was unfamilar to me and stood out amid the other birds I could also hear and easily identify (Parulas, B&Ws, Magnolias, Redstarts, House Finches, Chipping Sparrow, etc), and I did not have my bins. There were a number of warblers around this morning so I have been searching primarily through warbler songs. This song was clearly four notes followed by three buzzes and repeated. I am trying desperately not to go to the Golden-winged warbler, but that is the closest I'm able to come to the song. This song's four notes seemed slightly slower than the recording on All About Birds. I'd welcome any thoughts.

  Thanks.

Karen.