Can you elaborate on the custom prompting? As in "You are a scribe attending a meeting of engineers discussing how to implement ElasticSearch. Please take this recording and create detailed notes of the discussion?"
Depending on your use-case it might include things like, "be sure to highlight the contributions and points of view of each participant", or "come up with a list of action items and who's assigned to each one", or "ensure the summary doesn't include confidential details about our new product".