How to Write Text That Sounds Great When Spoken by AI A developer has published a practical guide to writing source text that sounds natural when spoken by AI text-to-speech and voice-cloning systems, arguing that the input script matters as much as the synthesis model. The guide recommends keeping sentences to 8–12 words, using contractions, relying on punctuation for pauses and intonation, and applying prosody tags for pitch and rate control, with code examples targeting the ElevenLabs text-to-speech API and its stability and similarity_boost voice settings. When you’re building a voice‑enabled product, you might think that the magic happens only in the neural network that turns raw audio into a human‑like voice. In reality, the source text is just as crucial. A poorly written sentence can make even the most advanced TTS system sound robotic, stilted, or, worst of all, unintelligible. This article dives into the practical tricks that will make your text sound great when spoken by AI, with a focus on voice‑cloning and text‑to‑speech workflows. We’ll also show you how to hook everything up with ElevenLabs, the leading platform for realistic voice synthesis. A general rule of thumb for TTS is to keep sentences to 8–12 words. Long, complex sentences create pauses that feel unnatural. If you need to convey a lot of information, break it into multiple shorter statements. Bad: “Despite the fact that we have been working on the new feature for several months, the final release date will be pushed back due to unforeseen technical challenges.” Good: “We’ve worked on the new feature for months. The release date is delayed because of technical challenges.” Contractions e.g., “don’t,” “it’s,” “they’re” make the speech feel more conversational and reduce the need for the TTS engine to pronounce the extra syllables. Most TTS engines handle contractions naturally, but it’s a quick win you can’t ignore. TTS engines rely on punctuation to determine pauses, intonation, and emphasis. Missing commas or periods can cause the model to read a string of words in a flat tone. | Punctuation | Effect on Speech | |---|---| | Period . | Full pause, end of thought | | Comma , | Short pause, keeps flow | | Exclamation mark | Raised intonation, emphasis | | Question mark ? | Lowered intonation, question tone | | Ellipsis … | Slight pause, trailing off | Tip: If you’re writing dialogue or instructions, double‑check that each sentence ends with the proper punctuation. Some TTS APIs, including ElevenLabs, support prosody tags—small XML/HTML snippets that let you control pitch, speed, and volume for specific words or phrases. This is especially handy for brand voices or when you want to emphasize a call‑to‑action.