Hey Marie I was listening to this cd (Chameleom Days) today and I had an ear out for that whistle on 1.49 and 4.58. It does sound like a person whistling. I'd love to hear you do your version of the whistle. When I think of Marching Season, the version on The Live At The Acropolis comes to my mind. I just watched it on dvd today also and the whistle I thought you were speaking of was that train sound when Charlie is "Gettin Down" (if that term is still in use) and everyone is clapping along with him, and he does that sound. It almost looked like he bent over and blew into something. That song is so fast. I love seeing Yanni playing the piano to it, he literally is playing almost completely off his seat. It said on the Chameleon cd it was 1988. I think him and Charlie have altered it for the better since then. It is a great song to watch, with the crowd participation and all.