The sound of the music fading in and out in the video above is not due to a poor recording. That is how it actually sounds as you ride through the updated Space Mountain. For a few seconds, you hear fast-paced, thumping dance music -- and then back to silence. Then the music returns, or perhaps a “whooshing” sound effect -- then back to silence. It repeats throughout the roughly 2-minute ride, culminating in a fun spiraling sound as you round the ride’s final turns.Like I said, adding speakers along the track is a creative solution but the experience is mixed.