By Chance Shiflett, Solutions Engineering Manager - Feb 11, 2022
This tutorial recommends best practices to follow when working with the various Rev AI APIs.
Rev AI supports most common media formats. For best results, use a lossless format such as FLAC or ALAC, or a lossy format like MP3 or AAC with a bitrate of 192 Kbps or above.
If you control the audio source, record at 16kHz sample rate or higher. We can transcribe audio as low as 8kHz as well. Submit the audio in its original format.
For perfect speaker separation (speaker diarization), record each speaker on their own channel and submit the job using the
speaker_channels_count parameter. If the speakers are recorded on a single channel, do not attempt to modify the recording; submit the file as is.
Don't pre-process, up-sample or down-sample audio. This can distort the audio and reduce the transcript accuracy. The Rev AI speech engine is very robust and has been designed to handle a large variety of audio recordings.
To improve recognition of uncommon words, such as proper names and special technical terms, submit a list of these words as custom vocabulary along with your request. Read the Custom Vocabulary API documentation for more details.
Learn more about the topics discussed in this tutorial by visiting the following links: