Question: Is there a way to personalize the voice parameters of a text-to-speech engine, such as rate and pitch?

Narration Box is an AI-powered text-to-speech service that offers high-quality, natural-sounding voiceovers in 140+ languages and accents. It comes with a block-based interface that's easy to use and a library of 700+ AI narrators speaking in different accents and dialects. With Narration Box, you can fine-tune voice inflection, rate and pitch, and use more advanced features like context awareness, emotive styles and long-form support. You can also customize pronunciation and add pauses and breaks to your text-to-speech output.

ElevenLabs also offers high-quality, realistic voices in 29 languages and more than 120 voices. It has features like voice cloning, fine-tuning and dubbing studio that lets you create your own voices and control the output. It's geared for content creation, gaming, audiobooks and chatbots, and has flexible pricing options including a free plan with 10,000 characters per month and speech in 29 languages.

If you need something more scalable, PlayHT offers more than 600 ultra-realistic AI voices in multiple languages and accents. It also offers custom pronunciations, voice inflections and real-time voice cloning. PlayHT is good for video voiceovers, audio publishing and conversational AI, and offers a free version and a variety of pricing tiers.