Fact · Speech recognition
Google Cloud requires streaming audio to be sent at about the speed at which it is spoken, and it returns an error for content that exceeds the limits.
Checked against its source on October 17, 2026
In the source's own words
“For StreamingRecognize requests, audio must be sent at a rate that approximates real time.”
Quotas and limits (Speech-to-Text, Google Cloud), Google Cloud, Google Cloud, n.d., Audio length limits table.
Open the original- What it measures
- The rule applies to the StreamingRecognize method, which is the method a live microphone app uses.
- What it does not show
- The rule is about the sending rate, so a client that streams faster than speech cannot get results faster than the audio arrives.