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Octave TTS

Octave TTS

Describe any AI voice and prompt its emotional delivery

Overview

What it is

Hume is a research lab and technology company. Our mission is to ensure that artificial intelligence is built to serve human goals and emotional well-being.

Intent

I need it when

Build AI-powered digital avatars or characters with realistic, engaging voices

Octave TTS supports voice cloning, voice design via descriptive prompts, and voice conversion. Users can create custom voices or select from 100+ pre-designed expressive voices, then deploy them across applications, games, and virtual experiences with LLM-driven expressiveness.

Scale text-to-speech synthesis from prototype to production with predictable, usage-based pricing

Octave TTS offers tiered monthly plans with included character allowances and transparent per-1,000-character overage rates. Plans scale from Free (10K chars/month) to Enterprise (custom), allowing teams to start small and grow without vendor lock-in uncertainty.

Create expressive, emotionally nuanced narration for video, podcasts, or audiobooks

Octave TTS is a speech-language model that understands context and meaning, enabling expressive voice synthesis with varied tone and emotion. Unlike conventional TTS that merely reads words, Octave generates speech with prosody, intonation, and personality suited to creative content delivery.

Deliver educational or coaching content with emotionally varied, engaging speech

Octave TTS generates context-aware speech that adapts tone and pacing to lesson content, making educational delivery more engaging. The LLM-based approach ensures prosody and emotional nuance match instructional intent, improving learner engagement and retention.

Drop

Not a fit when

  • User requires real-time speech-to-speech interaction with emotional responsiveness; EVI (Empathic Voice Interface) is the appropriate product for that use case, not Octave TTS
  • User needs to analyze facial expressions, vocal prosody, or emotional language in existing media; Expression Measurement API is required instead
  • User requires open-source models; Octave is closed-source; TADA is the open-source LLM TTS alternative
  • User needs voice interaction that detects and responds to user interruptions and back-channeling; EVI handles this, not Octave TTS which is synthesis-only
  • User operates under strict budget constraints with minimal usage; the Free plan caps at 10,000 characters (~10 minutes) monthly, insufficient for most production applications
Commercials

Pricing

USD0 - USD500 / monthly View pricing