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# Categorize Audio

The following schema describes how to use the `audiopreproc` module to identify regions of silence, speech, and non-speech in an audio file.

    [AudioNet]
    0 = a ← wav(MONO, input)
    1 = w ← audiopreproc(A,a)
    2 = output ← wout (_, w)

`0` | The `wav` module processes the mono audio.
`1` | The `audiopreproc` module in audio categorization mode (`A`) processes the audio (`a`).
`2` | The `wout` module writes the audio categorization information (`w`) to the output file.

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