The music and spiels are still there, when the computer and sound system are working. But they rerecorded and "updated" the spiels (for the first time in 9 years), and the new arrival spiels do not include the burst of music ("MMC March", "Imagination", "Hooray for Hollywood", and the music from the Safari.) They also genericized the language in the arrival spiels, making it less park specific.
I put "updated" in quotes because they did a really poor job of updating the middle spiels, IMHO. The middle spiels are the ones that play when you're 5 minutes away from arriving at the park, which had been discontinued for some parks years ago because they had become so obsolete. In the new ones, they changed "Fastpass" to "Fastpass Plus", but didn't change the description, so it now makes little sense. They talk about attractions that were scheduled to be removed shortly after the update: Soarin' "direct from California Adventure" on the Epcot middle spiel, and "Lights, Motors, Action" in the DHS spiel. They've already discontinued the DHS spiel again. And nothing was said about new attractions that had already been announced at the time of the update -- probably because they intend not to update them again for another 9 years.