Asynchronous (audio/video file transcription)
When you submit an audio file for transcription, it will complete in 15-30% of the audio file's duration. So, a 10 minute file would complete in around 1.5 minutes, but could take up to 3 minutes.
Synchronous (transcription of audio streams)
Our synchronous API is best suited for very short audio files, <15 seconds in duration, or for short "utterances" of speech collected via an app like a smart speaker or interactive, voice controlled bot.
Synchronous requests complete in 100-700 milliseconds, depending on the audio duration.