Question 1

What is text-to-speech (TTS)?

Accepted Answer

Text-to-speech is a technology that converts written text into spoken audio. Modern AI-powered TTS systems use deep learning to produce natural, human-like speech with proper intonation, emotion, and pacing.

Question 2

What are the best TTS models available?

Accepted Answer

Top TTS models include ElevenLabs Turbo v2.5 for speed and quality, OpenAI TTS-1 HD for consistency, XTTS v2 for multilingual support and voice cloning, and Google Chirp3 HD for enterprise scale. The best choice depends on your specific needs for speed, quality, languages, and cost.

Question 3

How much does TTS API cost?

Accepted Answer

TTS pricing typically ranges from $0.01 to $0.05 per 1,000 characters. Kugu offers pay-as-you-go pricing with no minimums, so you only pay for what you use. Premium models like ElevenLabs Eleven v3 cost around $0.03-0.05/1K chars, while standard models like OpenAI TTS-1 cost about $0.015/1K chars.

Question 4

Can TTS generate voices in multiple languages?

Accepted Answer

Yes! Modern TTS models support multiple languages. ElevenLabs supports 32 languages, XTTS v2 supports 17 languages with voice cloning, and Google Cloud TTS offers 220+ voices in 40+ languages. Some models can even maintain voice characteristics across different languages.

Question 5

What's the difference between streaming and batch TTS?

Accepted Answer

Streaming TTS generates audio in real-time, sending audio chunks as they're created—ideal for chatbots and live applications. Batch TTS processes the entire text first, then returns complete audio—better for pre-recorded content. Models like ElevenLabs Turbo are optimized for streaming with sub-500ms latency.

Question 6

How realistic are AI voices compared to humans?

Accepted Answer

Premium AI voices are now nearly indistinguishable from human voices in blind tests. Models like ElevenLabs Eleven v3 can capture emotion, breathing, and natural speech patterns. However, very long content may reveal subtle repetitive patterns, and emotional nuance in complex scripts still favors human voice actors.

Question 7

Can I use TTS for commercial purposes?

Accepted Answer

Yes, most TTS APIs allow commercial use under their terms of service. However, if you're cloning a voice, ensure you have consent from the voice owner. Check each provider's specific terms—some have restrictions on political content, adult content, or impersonation.