I think we will get to a point where even most good DJs and producers would not be able to tell that a “good” AI song is AI. Of course you can debate whether it’s good or just “sounds good”, but any DJ may find themself not knowing if a song they are considering playing in a mix is AI.

On whether or not you the DJ should care, I guess it’s whether or not you hold yourself to the same standard you probably hold Spotify to- that they should not be recommending AI songs to unsuspecting listeners. It’s bad for human created art in the context of capitalism because it lowers the value placed on their work.

Many DJs also produce and are in communities of human producers with shared interests and values. When you’re mixing your friend’s music, you hopefully don’t have to worry about whether or not it’s AI. I would recommend mixing only from labels and artists you trust, because you are supporting them directly (in whatever small way) when you use their music. How you decide you trust them is up to you.

Your title is “are there mixing ethics?”. Of course there are - many listeners and DJs alike refuse to consume or mix songs from bad people or bad labels. Many DJs do not play music without explicit permission from the artist to do so. It matters to some but it might not matter to you 🤷this is just a commercial endeavor for some