"Ah, music! A magic beyond all we do here!" 
     -- Albus Dumbledore

"Music is myth, metaphysics, and magic."
     -- Ferruccio Busoni

songs - (lyrics)

• Sorting Hat's Songs (1991: SS7, 1994: GF12)
• Hogwarts School Song (SS
• Ginny's singing valentine for Harry (CS)
• The merpeople in the Lake sing a song to tell the Champions what the Second Task will require:
"Come seek us where our voices sound,
We cannot sing above the ground,
And while you're searching, ponder this:
We've taken what you’ll sorely miss,
An hour long you’ll have to look,
And to recover what we took,
But past an hour --  the prospect's black,
Too late, it's gone, it won't come back." (GF25)

• Gringott's motto (SS5)
• Peeves' taunting rhyme to Harry ("Oh, Potter, you rotter...") (CS11)

• Snape's potion riddle (SS16)
• the sphinx's riddle (GF

• flute, hand-carved by Hagrid, given as a Christmas present for Harry (SS12). This flute is played by Harry and Hermione to put Fluffy to sleep (SS16).
• musical saw band at the Deathday Party (CS
• Weird Sisters - famous group, played at the Yule Ball (GF23)
• Celestina Warbeck - singer on the Wizard Wireless (CS
• Hagrid sings drunkenly after Buckbeak escapes (PA20)
• Albus Dumbledore enjoys chamber music (SS6)
• Nicholas Flamel is an opera lover (SS13)
• Phoenix song - magical musicof surprising power (CS, GF

Merpeople love music (FB). 

• Yule Ball (GF23)
• Dumbledore was rumored to have booked a troupe of dancing skeletons for the Halloween feast in 1992. Since Harry, Ron, and Hermione went to the Deathday Party instead, they didn't find out if the rumor was true. (CS8)
• Hogwarts Ghosts entertain at Halloween with formation gliding (PA8)
• Veela dance before the World Cup (GF8)
• Moody makes spider do a song and dance routine (GF14)