Best item type for transcripts of secret recordings
What would be the best item type for a transcript of a secret recording. It's not an interview since the participants are just having a conversation that they don't know is being recorded. It's not really an audio recording since the format itself is a text transcription, and it is weird to list the participants as "performers". Is there a better item type than "Audio Recording"?
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As long as the format roughly keeps with the norms of whatever citation style you're using -- which it will with most item types -- it's fine.