Alternatives to Fingerprints

1. Seed a PRNG with the fingerprint, generate a short melody (e.g. 10 second audio clip) with random pitches and time intervals.
2. Images, pseudorandomly chosen and replaced with a false color dependent on the fingerprint

Basis: It's easier to say "a blue eagle with green eyes and an orange beak, followed by..." or detect a different melody than a string of random numbers and letters.