Developer Builds Multi-Character TTS App to Test Telnyx Voices in Real Scenes

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A developer created a small application to address a gap in standard voice-picker tools, which only play fixed sample sentences and fail to demonstrate how a voice handles emotion or pacing in context. The app allows users to write a short scene, assign each character a different Telnyx Ultra voice, and attach an SSML emotion tag per character. When rendered, the app makes parallel text-to-speech API calls and stitches the audio into a single continuous MP3 file. The default demo scene is the Ides of March from Julius Caesar, featuring five characters — Cassius, Caesar, Brutus, Mark Antony, and a Narrator — each with a distinct voice and emotion. The project code is publicly available on GitHub under the Telnyx code examples repository.

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