In season one of the tv series, The Sinner the main character Cora becomes violent upon hearing an obscure familiar song that unknowingly relates a past traumatic event that she has blocked out.
The song, out of universe, is by a band called Big Black Delta titled, Huggin & Kissin.
In Season two viewers are introduce to a new case, but again in relation to the season one character, Detective Harry Ambrose. The story so far is about a boy named Julian Walker accused of murdering two adults when they seemingly abduct him from a cult, in which the boy grew up in, and where another backstory-character named Maureen mystery disappeared after joining the cult many years ago.
This cult was originally run by a psychotherapist referred to as The Beacon who used unorthodox and seemingly deadly approach in allowing it's members to violently act out emotions or past traumatic experiences, which in turn seems to get passed on, possibly by proxy and hypnosis, to all members. There are public therapy sessions and private therapy sessions, but in the private sessions a metronome device is used, emulating sounds similar to amplified heartbeat.
I'm trying to find a video clip/image of the metronome in use, but so far no luck, but the sounds coming from the device used are VERY similar to droning pulsating drum beats in the (Big Black Delta) song that triggered Cora in season 1.
So my question is, are these sounds only thematic to retain certain elements/concepts (pulsating sound in relation to trauma, blackouts, and acts of violence) or are they somehow more directly related?
Please Note: I recognize that season 2 isn't quite finished and that the series has yet to be renewed for a third season, but it is possible that there is an interview somewhere that might outright denounce the possibility of direct inverse relationship between the noises in question.
In addition to explain the purpose of this question, I think it would be likely that, at some point, Detective Ambrose would recognize this correlation and would ask this question himself. This would then add to the plots of both seasons, upon recognition, while enriching Ambrose's ongoing story as a character.