I’m no expert, but I’m very surprised that the drum tracks were already mixed down to stereo on the master tape.
Once they’re mixed down to stereo they’re essentially locked in and you can’t adjust anything (you can’t crank up the bass drum, for example). Considering that the drums are such an important component to that type of music, it seems surprising.
Maybe that’s just how they rolled in the 70s. I suppose it wasn’t until the 80s that mainstream producers started to really play around with drum sounds.
Edit: After reading some of the YouTube comments, it turns out the drums were taken from another song, slowed down slightly, and played on a loop. That would explain why they’re already mixed down.
