Not sure which call you’re referring to, but Head of State level calls haven’t been recorded since the 70s and Nixon shenanigans. Or so it’s been reported as such. So interesting when media or others refer to “official transcripts” as opposed to “meeting notes”.
At least to me, the term “official transcripts” might as well be a recording. The transcripts of meetings, depositions, etc that I’ve had to review we’re generated from both video and audio recordings. So if there is no recoding, at least official one... oh wait... unofficial recording of the conversations. Who would do that? Now that is some mild tinfoil level there. 🤔
From my discussions and readings, it's a multi-step process.
Voice recognition software actually creates the transcript. But, interestingly enough, the voice is not that of the President or other parties involved in the call. Instead, a staffer listens to the call and repeats what's being said, much like a court reporter "records" the dialogue during court hearings.
There may also be others listening to the call in other locations who take notes. Their notes are used to create official memos of the content of the call (not necessarily the exact conversation), and the memos are filed with the transcript.
Together, the memos and software-generated record become the "official transcript" of the call.
Given the process as I stated, the press trying to read any meaning into Trump's words on a call is an exercise in not just futility, but dishonesty. If the transcript is a collection of people's understandings of what was said, then there is no "mob boss" covert language to glean from the record. Only those actually on the call can interpret what was said, as well as the way it was said.
"Ol' Bag full of Schiff" and Pelosi are using the words of an anti-Trumper as Gospel, while the official transcript demonstrates none of the accusations are true.
They can try to deduce Trump's motivations for asking to look into the Bidens, but that's not evidence. Perception varies by individual.