Originally posted by QUESTION
The Receipt for DEF CON 25: https://media.defcon.org/DEF%20CON%2...25-Receipt.pdf
For a list of DEF CON 25 files on the media server:
https://media.defcon.org/DEF%20CON%2025/
The media server also contains audio files for music CD in other formats:
https://media.defcon.org/DEF%20CON%2...%2025%20music/