Sound playing when reading a note.

[Cruzore]

That way it does play with you read, but when you close the journal, it still plays. And when you reopen the note, it won't play anymore. That is the closest you can get.
If you want the music to loop when reading the note, but want it to stop when not reading anymore, you could add a script area around where the player could stand(make sure he won't, just around it), add a collide callback inside the function from above, and let that callback function stop the music. Any player would go on after reading it, not just stand there thinking "duh", so that should be a good way of stopping the looping music.
But for the sound/music playing again when reading it a second time, I don't think that's possible