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The minimum audio duration for a file submitted to our API is 160ms. Files submitted to our API that are shorter than 160ms will return an error: 
{
  ...
  "status": "error",
  "audio_url": "https://foo.bar",
  "error": "Audio duration is too short.",
  ...
}
To fix this issue:
  • Add error handling for this error message: When this error occurs, handle it safely by checking the error string and returning the error.
  • Add pre-submit checks for the duration of the audio file: Prior to submitting a file for transcription, check the duration using a tool like soxi (part of the SoX package): soxi -D audio.mp3