: Check the file properties. Sometimes the "Comment" or "Artist" field in the ID3 tags contains a password or a hint.

: If you find a string like ZmxhZ3t0aGlzX2lzX3JvY2tfbnRfcm9sbH0= , use a tool like CyberChef to decode it from Base64 . Likely Flag Format

: Listen for unusual beeps or rhythmic patterns that could indicate Morse code hidden in the background of the track.