Cryptography Challenge 3 - Million Dollar Cat

Prompt

One of the members and financiers of Liber8tion is a fan of cats. She has recently passed away, but left some hidden information for other members of Liber8tion who also love cats. Investigate the transmission.

Answers

Q1 (10 pts) - What is the precise standard RTTY speed for amateur radio, in baud?
45.45

Q2 (10 pts) - What is the name commonly (but incorrectly) used for the International Telegraph Alphabet No 2?
Baudot code

Q3 (10 pts) - What does a stop bit have to be in this transmission?
Logic 1

Q4 (10 pts) - What audio modulation method is typically used to transmit these encoded messages?
AFSK

Q5 (15 pts) - What is the flag?
SKY-KITT-7611

Steps I Took

I first assumed the audio was Morse code, so I tried a Morse decoder. That did not return anything useful.

After that, I searched for the wording of Q1 to identify the transmission type.

That led me to RTTY decoders, which looked much more promising.

I decided to install fldigi and test it.

I changed the operation mode to RTTY-45 based on the baud rate from Q1. I was not fully familiar with the setting, but it matched the clues from the prompt.

I loaded the WAV file, and it transcribed the message for me.

For the remaining questions, I used documentation and reference searches to confirm the details. For Q3, I originally answered Mark, but the challenge was looking for Logic 1. Based on this documentation, the terms appeared to be used in a very similar way: https://www.cryptomuseum.com/ref/ita2/index.htm I submitted a support ticket after checking the reference.

They removed the incorrect response for Mark. I am still not completely certain whether the terms are fully interchangeable, but the reference suggested they were close enough to justify the correction.