What exactly is the "duration" attribue in the Metadata event for STT Live Audio?

[cels]

Hi,

we are using the Live Audio STT of Deepgram for transcribing the user's input.

As we need to do per-user metering of usage we aggregate the data received through the Metadata event via the websocket connection which includes the attribute duration.
See https://developers.deepgram.com/reference/speech-to-text/listen-streaming#receive.ListenV1Metadata.duration

We discovered now that our aggregated usage is off by >10% compared to usage export from Deepgram so we started investigating where this originates from.

One thing we are trying to clarify now is what exactly is duration? The aforementioned docs just state "The duration". The duration of what exactly?
And how does it relate to the exported report's numbers in hours and total_hours?

Thanks in advance!

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[cels]

Anybody, please?

[deepgram-community[bot]]

👋 Duration in this sense should be total duration of the audio transcript.

• Meaning: duration is the length of the audio segment covered by that Results event — i.e., how long the transcript in this event spans.
• Relationship to start/words: end_time = start + duration. Each word also has start and end timestamps in the same units, so duration should match (or be near) the span covered by the words in that result.

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