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# Speech-To-Text

Speech-To-Text transcribes words spoken in audio into text.

Configuration Parameter | Description
--- | ---
AlternativeWordsThreshold | A threshold that alternative words must meet to be included in the output.
CustomLanguageModel | The identifier and interpolation weight of each custom language model to use.
CustomWordDatabase | The name of a custom word database to use.
FilterMusic | Specifies whether to include speech-to-text results for audio segments identified as music or noise.
Input | The audio track to process.
LanguagePack | The language pack to use.
MatchWords | A comma-separated list of words to tag in the speech-to-text output.
MatchWordsAddUnknown | Specifies whether to add any unknown `MatchWords` to the language resource.
MatchWordsCaseSensitive | Specifies whether matches between `MatchWords` and the speech-to-text output are case-sensitive.
MatchWordsThreshold | The minimum score that is necessary for an alternative word to be considered a match to one of the words specified by `MatchWords`.
NumParallel | The maximum number of audio segments to process concurrently.
SampleFrequency | The sample frequency of the audio to send to the audio service.
SpeedBias | Specifies whether to prioritize processing accuracy or speed.
SyncDatabase | Specifies whether to synchronize with the training database before beginning the analysis task.
Type | The analysis engine to use. Set this parameter to `SpeechToText`.

## Output Tracks

Output track | Type | Description
--- | --- | ---
`Result` | SpeechToTextResult | Contains a record for each word.

SpeechToTextResult

Field name | Type | Description
--- | --- | ---
id | UUID | A universally unique identifier to identify the section of audio described by the record.
text | TextData | The spoken word converted to text.
confidence | Int | The confidence score for the speech-to-text process.
matched | Boolean | Specifies whether the word (or an overlapping alternative that exceeds `MatchWordsThreshold`) is in the list specified by `MatchWords`.

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