I'm going crazy.
This small(?) plot point just came into my mind and its pretty vague. Not sure if this was in a film or a TV series but I believe I watched it in the past decade and at that time it was new.
Here all that I remember: Protagonist/s are trying to solve some sort of mystery or supernatural occurrence. They end up at a cabin in the woods or lighthouse by the sea where a old couple(?) are there. Maybe an elder and a younger adult. The cabin couple have old audio recordings of some mysterious sound that is either underwater or related to seaside airwaves. I think at first the keeper of the tapes does not trust the protagonist but eventually opens up about the audio recordings and gives them to the protagonist or at least plays them for them. There might also be a point where they have to go out in a boat to retrieve the tape or hear the audio themselves.
This is all I remember and its driving me crazy trying to figure out what media this happened in. Likely English media
Help!? Thank you