Heartland

When I compare the single version of „Adrenochrome“ with the Floorshow demo and live versions, it appears to me that they definitely sped up the tape. I‘m not sure if it is just the backing track that has been sped up or if the vocals have been sped up, too?

I mean, sped up to a higher key. Similarly, „Fix“ has been slowed down to a lower key, compared to the live versions (or they tuned down the bass and guitars for this one).

Correct. That's why they're the best thing the Sisters did. Should have retired then