https://www.youtube.com/watch?v=92Dcp9Fbdac
This song was encoded on a string of DNA and spliced into the genome of a colony of bacteria as a means of creating a work of art that will outlive humanity. The bacteria are spreading and evolving in the wild, so theoretically this song will exist as long as that thread of life continues somewhere.
So basically the first/only human voice the aliens might hear is gamerloli.