Needs user to sign up, I just gave a try with file downloaded from:
https://stonerebel1.bandcamp.com/track/far-beyond-the-dark
Duration: 356 seconds
Spectral analysis:
Human: most likely (90%)
Modified AI: probably not (5%)
Pure AI: probably not (5%)
Temporal analysis:
Human: likely (75%)
Modified AI: unlikely (25%)
Pure AI: highly unlikely (1%)
No idea about if it is correct or not:
https://www.reddit.com/r/stonerrock/comments/1jfrpe3/are_these_real_bands_octopus_diver_stone_rebel/