Don't know if it's audio compression, or just a different recording.
In the Apollo 13 Soundtrack, there's a repeated theme with flowing strings and a distinct plucked bass note. Now, I have a CD recording of the track "All Systems Go / The Launch" on a #ClassicFM at the Movies album. On that recording, the bass note is almost subliminally deep. It's audible, but almost as a feeling than a sound.
Alternatively, the version of this track on YouTube (and currently playing on StreamingSoundtracks) has a much more audible, "twangy" bass note. It's more like a bass guitar than an organ.
As I say, I can't tell if the difference is that the YouTube algorithm has compressed the sound, or if it is actually a real difference due to a different recording, but my point (I'd get there eventually) is that I prefer the CD version. The "newer" version makes the bass note too noticeable for my taste.
Current Music: James Horner - Apollo 13 - All Systems Go / The Launch
Current Mood: Picky