I don't think the mix would take up that much time. You'd get the equivalent of one CD a month of untagged music (so you don't have any prejudices before listening to it), and write 100 words or so about the music you get. At the end of the month, I reveal who received the respective mixes, and you'd then be free to reveal what your mix contained if you want.
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ICON:
Yeezy taught me.