Photo of person who left the audio:
Photo of the package:
Links:
Reddit thread: https://www.reddit.com/r/cuboulder/comments/lkqsta/does_anyone_have_any_information_on_the_cds_taped/
Instagram of the group who first solved the puzzle (account is now private since recording): https://www.instagram.com/carlin_hornbostel_/
Unedited Audio: https://drive.google.com/file/d/1noMO0m7JYGEVBuU5o2O9RicnHb7Bwzt7/view
Calvin and Hobbes Strip: https://www.gocomics.com/calvinandhobbes/1992/04/19
Python Code used to solve the number puzzle: https://i.imgur.com/2GjJHyk.png