Thanks for giving it another go! Definitely a design problem that it's not clear enough what affect certain interactions are having that I would need to work on.
I will share that from the second room on there are multiple stations to tune to which provide parts of the whole clue needed to solve the puzzle. Originally I had these set at different positions, so you would rotate around and hear multiple broadcasts and have to piece them together, but some early feedback from a friend suggested that was confusing, and they suggested separate "bands" which you toggle between with the dpad. The trouble there is that it's easy to completely miss this mechanic, as was the case for you. Different kinds of static on each band, or a voice over to label the bands would probably solve that issue.
Anyways, I really appreciate you taking the time to experiment with it and provide detailed feedback.