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# Analyze Speech

CFS extracts metadata from audio and video files but cannot process their content, so by default documents that represent audio and video are indexed without any content. You can enrich these documents by sending the files to an IDOL Speech Server. The Speech Server processes the audio, extracts any speech, and writes it to the document content.

The processing task that sends files to IDOL Speech Server for analysis is called `IdolSpeech`. It can include the following steps.

1. Documents are identified that require speech-to-text processing.
2. (Optional) CFS sends the audio to an IDOL Speech Server to determine the language of the speech.
3. CFS sends the audio to an IDOL Speech Server for transcription.
4. CFS adds the transcription to the document content.

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