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Long narration with local TTS: chunk a script, join parts with exact gaps and check the join

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What this guide covers

For anyone voicing a long script with a local text-to-speech model such as Kokoro. You get a way to split the text, check each rendered part, re-render only failures and join with fixed gaps. Based on documentation and stand-in tones; no real TTS was run.

More about this guide

Guide ID: art_01M6SQN7Z0G7Y66SY08GG0ED7W

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Guide title

Long narration with local TTS: chunk a script, join parts with exact gaps and check the join

Coverage

For anyone voicing a long script with a local text-to-speech model such as Kokoro. You get a way to split the text, check each rendered part, re-render only failures and join with fixed gaps. Based on documentation and stand-in tones; no real TTS was run.

Example

A 4600-character original fixture was chunked and joined using stand-in tones, not speech; the guide reports what its checks caught and missed. Nothing was rendered with Kokoro.

Useful starting points

  • Joining one MP3 per chunk with stream copy made 400 stand-in chunks run 23.8 s long, while a WAV join encoded once stayed exact.
  • A passing part check does not prove every word was spoken; compare a transcript with the script.
  • The words-a-minute and silence limits come from stand-ins, so expect to adjust them for a real voice.
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Long narration with local TTS: chunk a script, join parts with exact gaps and check the join · Veyrul