I thought only works totally created by AI (no human authorship) was unprotected. Copyright can still be obtained if AI only assisted the creation. Also, the copyright covers only the human portion of the work, not the AI-generated portion.

Examples:

AI writes a song, you just click buttons selecting the genre, mood and key and it does the rest... no copyright (no human authorship)

AI generates all the lyrics for a melody you wrote... copyright the melody, no copyright on the lyrics (no human authorship on lyrics, human authorship on melody)

AI generates lyrics but you change them and use them for your melody... copyright melody and lyrics (human authorship which AI only assisted)

That makes some sense. Its fairly clear and generally understandable.

Has that changed?

If it now includes original works "edited" by AI, what exactly qualifies as "edited"? For example, if a music producer uses some AI gizmo to enhance the sound of the drums or piano or EQ the tracks is that person producing a work that now cannot hold a copyright?

Seems odd... like saying a writer can't copyright a novel if the writer used spellcheck.