[steppi]

I think even timbre matters. I got a 95% match singing the first verse of Smells Like Teen Spirit using vocal fry to add some rasp, but couldn’t get over 80% singing in an unaffected soft head voice, though I got a 79% match for a cover by Malia J which wasn’t even originally in the results. Maybe I unconsciously matched the melody more closely when trying to do my best Kurt impression?

I just tried it belting from my chest voice like Michael McDonald and only matched covers; the best match only 33%. None of them sounded like Michael McDonald.