Anything by Elizabeth Mitchell. It's actually good music that won't destroy your own brain.
Also we love the rockabye baby stuff. Currently have the
U2, Tool, Smashing Pumpkins and NIN albums.
Other than that we just play lots of classical music and stuff we like around Amelia. Iron and Wine, Sigor Ros, M83, Daft Punk, etc.
Also, I have a cherry picked group of songs from movie/videogame soundtracks that Amelia loves and gets excited by. Stuff from Assassins Creed, the Nolan Batman films, Man of Steel, Oblviion, etc.