For several years now, an Australian scientist named Cameron Jones (and a lot of other people) are applying fungus and molds to the playing surface of CD, specifically to play with the mold's audio properties. And you'd be surprised what it sounds like. Rather than muffling the audio, it adds echo, audio holes and glitching, all effects that people pay good money to achieve electronically. Jones and his fellow molecular remixers also use microscopically thin layers of plastics to effect audio, not to mention movies, photography and artwork.
Jones did a one-hour DJ set at a club in which he played only songs which had been altered with fungus, bacteria or synthetic nano-substances. Here are a few MP3 samples from his set, all for download...
This now this is what I call a bio-remix... lol :)