I am a DJ myself, but I would still give credit to the authors of the tracks rather than claiming it for myself (even when itβs a unique interesting combination or flow).
Sure. You build up on existing art.
Like is done here with the generated art, it probably does not make much sense for one person to claim he "created" and owns this image. Would be hard to judge, how much credit goes to the programmers, the basic AI researchers, all the people who created the input on the AI to learn ...
It very much depends on the type of DJ. But a good DJ performing live, is indeed generating music, as he feels the vibes of the crowd and mixes in the exact tracks fitting to that moment.
Not predefined track after track, but they blend in and over on each other.
If you do this with parts of a song from here and then there, with a small snippet from something else - it is indeed generating new music in my book.
And I think alien dreams and ai generated art alike ... can move into that direction. Generating art, by knowing the various tools and combining them.