Correct. Well done Suss. I use a free site called MazMazika. You just copy the YouTube link and it separates tracks into instrumental 'stems'. Ie piano, bass, guitars, drums and vocals. Very clear seperation so it's interesting to listen to the guitar parts in particular. You hear little things that you might miss when it's all mixed together. I presume anyone with the talent could mix up a Rats type song from bits of isolated material sampled from the stems.

I might try out another mystery sample and make sure there are no spillover vocals , perhaps just a 30 second section of a song.