The missing link https://johnmullard.bandcamp.com/album/to-see-noun
Also.... what is up with the last track in this playlist? :S https://johnmullard.bandcamp.com/album/no-players-online
In that first link, there is an audio file called "dial tone" that has Morse code. It translates to: PER SENTENCE LONGEST WORD LAST LETTER MINUS KEY WORD KEY:DOG
We're aware of the mysterious phone number mentioning KEY:DOG, and so far nobody has commented mentioning that audio file, so perhaps someone can put the pieces together with this new information?