If the ZIP is encrypted, the name "Tune-in-to-the-show" might be a hint for a password or a specific broadcast frequency (e.g., 101.5 ) used as the key.
Check the comments or metadata of the ZIP file using exiftool or zipinfo . Sometimes the "feature" is a hint hidden in the file headers. Tune-in-to-the-show.zip
Data might be hidden in the Least Significant Bits of the audio samples. If the ZIP is encrypted, the name "Tune-in-to-the-show"
If you hear "phone keypad" sounds, you may need to decode the dual-tone multi-frequency signals to get a numeric string or "feature" code. 3. ZIP Metadata or Password Protected If you haven't opened the ZIP yet: If the ZIP is encrypted