Mbo, the timing problem is probably because this is a very good imitation of a calliope - due to the nature of the beast, the steam doesn't get to all the pipes simultaneously, even when the keys are pressed at the same time, hence the parts are always in a curious juxtaposition to one another. There may be some spurious notes in the 'doodly' parts, but when it's pulled into NoteWorthy, all the parts end together.

My suspicion would be either an aria from an italianate opera or an Italian folk song. But I sure have no ID for it.