Fact · Speech recognition
Azure's REST API for short audio does not support batch transcription or custom speech.
Checked against its source on October 17, 2026
In the source's own words
“Batch transcription and custom speech aren't supported via REST API for short audio.”
Speech to text REST API for short audio, Microsoft Learn (Azure AI Speech), n.d., Limitations.
Open the original- What it measures
- For a folder of recordings, the batch interface is the right tool, and it runs asynchronously.
- What it does not show
- The page names the speech to text REST API for batch work, which is a separate API from short audio.