1. Settle the verbatim level first
Clean verbatim is the common case: remove speech errors, stutters, repetitions and false starts that add no information, but keep repetitions used for emphasis. Expand slang — gonna becomes going to, yeah and yep become yes — and write Okay in full, never OK or Ok. Full verbatim keeps those features as spoken. Getting this wrong means reworking the whole file, so read the job type before the first line.
2. Label every speaker, including in single-speaker files
A bold label, a colon and one single space — never a tab: Mark:, Speaker 1:, Interviewer:. Use real names or descriptive roles where they are known, and prefix a question mark where you are not certain who is talking (?David:). A recording with one speaker still gets a label.
3. Apply the timestamp type the job asks for
Timestamping is decided per job. Where it applies, the format is a bold [00:00:00] in full hours, minutes and seconds, placed either every 2 minutes or at every speaker change — one type per file, never both. On a segment of a longer recording the time is file-relative, so minutes 20 to 30 open at [00:20:00]. The qualification test asks for no timestamps at all.
4. Mark unclear audio rather than guessing
Use [inaudible 00:00:00] where speech cannot be heard and [unintelligible 00:00:00] where it is heard but cannot be understood. Overlapping speech is [crosstalk], a separate tag rather than a kind of inaudible. Do not invent notation the guidelines do not list.