Like the previous Mirror's Edge, Catalyst is packed with a marvelous Ambient Soundtrack.
What did you think of it?
Personally I'm absolutely in love and stunned with the Sound Engine of frostbite and the composition of Solar Fields making every sounds happen organically.
It's probably less "obvious" and "in your face" than the first one which had beautiful soundtrack but it mixes much better with the gameplay transitioning smartly and playing appropriately with the environment whereas the first one had a much "trigger based" soundtrack (fight sequence / run sequence / city sequence / etc.)
ME: Catalyst on the other side seems to have integrated the music as an entire experience part of the game not supposed to distract the attention but emphasize the world we're in.
I must have hit the replay button way too much