Interview With Synamax(Guy who has all the Metroid Prime Drums/Music Samples)
I host a podcast called Kiwi Talkz and I spoke to a guy named Synamax. This guy has spent years investigating and collecting all the individual samples Kenji Yamamoto used in the Prime Trilogy. In this interview he goes into specifics and plays some of the samples.
One of the best parts in my opinion is at the 46:51 mark where he shows that Frigate Orpheon/Torvus Bog and Phendrana Drifts Pirate Lab all use the same music sample just at different octaves.
Podcast is here and it is timestamped as well.