I am grateful to all for the information and comments. This has been helpful. Marje your comments have added some insight and summed up other things offered here quite well. I certainly have a better understanding of the air and the waltz. This question arose because I have been writing notes for a radio program airing locally here in Arkansas but streaming to the internet. One of the selections we are using was described by the performer as a waltz. The timing was 3/4 but did not have the rhythm I associate with a waltz. I have no formal music training and very little informal training for that matter. I just listen to music and once played for the fun of it. Got no help by browsing the internet and turned to the experts. Glad I did. Much obliged, as the old folk in Virginia used to say.