I dont have the pre-context unfortunately.
I do have the image initially provided. This was solved but I think I lost the results I had.
The characters were decypherable to words.

Click to reveal flag
flag 7 lines
AHOY! CONGRTULTIONS ON
SOLVIN' DIS DIFFICULT PUZZLE.
LIKE aLL GOOD SaILDORKIDZ,
YE NEEDS a REWaRD. IF YE
WRTS T' HOIST a FLaG, HERE
KE ONE: FLAG-COHAUFYOXLASSYPDUnfinished
A music file was provided but not finished.
There was an attempt to analyze the audio file for morse code or other hidden data but it was not completed.

