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/