Well, interesting but how do we find out if a song is public domain? Is there a formula for "number of years after composition" or something? I have never had to check on this before. I can tell you that Wave was done 45 years ago, in 1967.

The only reason I chose Wave as the subject was that I have heard it done at least 10 different ways as far as big band arrangement vs pared down, one rendition did a key change, one bridged out into 1 Note Samba and came back, etc....