Airwormed

I am thankful for my air-conditioner, don't get me wrong—it's a godsend on days like this, especially when I'm moving bookshelves around.  But my new one sings.  Must be the frequency or something, but it plays ghostly melodies:  arrangements for alien woodwinds, lift-music for the Tardis.  Never more than the hook-phrase or the chorus, over and over again, until I hit pause.  It has a fairly wide selection of tunes.  Over the last week or two, it's given me:

Grieg's “Morgenstemning” (shades of Warner Brothers!)
"The Amphioxus Song" / "Tipperary"
“Wild Mountain Thyme”
“Among the Leaves So Green-O”
“The British Grenadiers”
“Blowin’ in the Wind”
Coke jingle:  “It’s the real thing...”
“Yankee Doodle”
“Rainy Days and Mondays”
“Gee, Ma, I Wanna Go Home”
“Ode to Joy”

Can anyone think what on earth these snatches have in common?

Nine