A speech-generation contract has two different inputs: the exact approved words and the delivery direction. The prompt may specify a calm pace, short pauses at sentence boundaries, and the intended audience, but it should not invite the model to rewrite facts while speaking. Store script and voice settings as versioned fields. If the generator can change wording, compare a transcript of the rendered audio with the approved script and route deviations for review. Treat duration as a measured output; a requested 34-second read is not proof that the audio lasts 34 seconds. Provide a text alternative for listeners who cannot use the audio, and retain the actual audio file version used for review.
Make this comfortable
Speech generation prompts: lock words before directing delivery
Operational case
A fictional museum prepares a short guide for the Orin Dial, a 47-centimeter display model with 13 brass markers. The approved script says the markers are decorative and the dial does not measure time. A draft audio prompt asks for 'a lively explanation of the clock,' causing the model to describe the object as a working clock. The production prompt instead supplies the exact script, names the adult gallery audience, and requests a measured pace with a pause after the first sentence. The editor checks the rendered words and duration. If the generator omits 'does not measure time,' the clip fails even if its voice sounds natural.
SCRIPT v3: 'The Orin Dial is a 47-centimeter display model.
Its 13 brass markers are decorative. It does not measure time.'
DIRECTION: measured pace; brief pause after sentence one.
CHECK: transcribe rendered audio; compare factual phrases and duration.Performance and operating cost
For N script tokens, a text comparison is O(N) after transcription, but listening to an audio clip of duration D takes O(D) human time at normal playback speed. A transcript match cannot catch clipped syllables, harsh volume changes, or a pause that obscures meaning. A shorter script may reduce generation time and review burden; compressing away a factual qualifier does the opposite of the intended work. Keep separate fields for script version, voice configuration, model, and rendered asset hash so a changed voice does not silently carry an old unreviewed narration.
Common Mistakes
- Do not let a style request rewrite approved factual wording.
- Do not assume a target duration equals the rendered duration.
- Do not accept a matching transcript as proof that the audio is intelligible.
Connected lessons
- Prompt engineering applications
- Prompt Engineering
- Audio prompts: preserve speakers, timestamps, and uncertain words
- Caption and transcript prompts: keep timing, speakers, and sound evidence
- Output budgets: bound length without cutting required facts
- Speech pronunciation prompts: resolve names and numbers explicitly
- Generated speech review: check the actual voice asset
- Video generation prompts: specify one shot's motion and evidence
- Generated video release: inspect continuity, claims, and alternatives
- Project: release an audio and video guide for a fictional exhibit
- Generated speech and video prompt decisions
prompt engineering
generated media