We're tinkering around with the game design a bit so hopefully in the next update it will be easier for more players to progress through all of the tapes. It's really hard to balance these audio puzzles because people hear things differently! Hopefully the solution we're implementing should help with this a bit. Thank you for your feedback!
P.S.
pssst... if you want to continue anyway the answer for that tape is...
SPOILERS
located
SPOILERS