Octave TTS
Describe any AI voice and prompt its emotional delivery
Octave TTS launched on February 27, 2025 with 282 votes, #119 of 5,999 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 1 year on.
In plain words
Octave TTS is an AI text-to-speech tool that generates voice audio with emotional nuance and expression. Unlike standard TTS systems that simply read text, Octave understands meaning and allows users to create custom AI voices while directing their emotional tone through descriptive prompts like "angrier" or "more sarcastic." The tool is designed for creators, storytellers, and developers who need expressive voice generation for content, applications, or multimedia projects.
written from the facts on this page · September 2026
From the sources
The first LLM for text-to-speech. While other TTS just “reads” words, Octave grasps their meaning. Create any AI voice with a descriptive prompt, guide its emotional delivery (angrier! more sarcasm!), and bring your stories to life with human-like expression.
Real human ratings, in a single API call. The human evaluation layer for voice, speech, and conversational AI.
Custom data collection built around your specific scenarios, use cases, and evaluation requirements. Kairos lets voice AI teams build evaluation suites from real-world use cases, simulate agent-to-agent and human-to-agent conversations, and track regressions over time, all in record speed. Real-time expression measurement and offline analysis across 48+ emotion categories and 50+ languages with 600+ output metrics, built for voice-native AI teams who need to know how callers are expressing themselves. Pre-screened human raters return per-sample scores, free-response feedback, and aggregated analysis. In hours, not days. How leading voice AI models perform across recognition, understanding,…from hume.ai
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