Octave
Text-to-speech with emotional intelligence. Generate expressive, natural-sounding speech that conveys the full range of human emotion.
Text-to-speech
Type text and click play to hear it spoken
Your voice, your way
Choose from a curated library of expressive voices, clone any voice from a sample, or design entirely new voices from natural language descriptions. Create the perfect voice for your brand.
Acting instructions
Direct the emotional delivery of every line. Specify tone, pacing, emphasis, and mood with natural language instructions. From whispered secrets to excited announcements—Octave performs exactly as directed.
“Speak slowly and in a whisper”
“Speak with urgency and excitement”
“With warm enthusiasm”
Real-time streaming
Start playback in milliseconds with streaming audio output. Octave begins generating speech instantly, streaming audio chunks as they're ready. Perfect for real-time applications where every millisecond counts.
Features
Everything you need for text-to-speech
Multilingual
Native-quality speech in 16+ languages with authentic accents.
Word and phoneme level timestamps
Precise timing data for lip sync, captions, and highlighting.
Multiple formats
Export as MP3, WAV, OGG, FLAC, or raw PCM audio.
Contextual continuation
Natural flow across requests with smart heteronym disambiguation.
Streaming output
Start playback immediately with chunked audio delivery.
Speed control
Adjust speaking rate from 0.25x to 4x speed.
Audio normalization
Consistent volume levels across all generated audio.
Voice presets
Save and reuse voice configurations for consistency.
For Developers
Generate speech in seconds
Integrate Octave into your application with just a few lines of code. Full SDK support for Python, TypeScript, .NET, Swift, and more.
Case Studies
See what others are building
Niantic Spatial × Hume AI: Creating Interactive & Spatially Aware AI Companions
In partnership with Snap Inc. (hardware) and Hume AI (voice), Niantic Spatial has developed location-aware companions for Spectacles, blending Snap Inc.’s AR glasses, Niantic Spatial’s Large Geospatial Model, and Hume’s Empathic Voice Interface (EVI) for natural, emotionally intelligent conversation. Niantic Spatial, the team pioneering AI that understands the physical world, is showcasing a compelling glimpse of what can happen when spatial intelligence and augmented reality meet.
GAF Powers Professional Training with Hume’s Text-to-Speech
To support their extensive training programs and marketing initiatives, GAF leverages Hume's text-to-speech technology to make internal training videos and marketing voiceovers. Our partnership addresses several key needs: Professional training content: Delivering consistent, high-quality audio for thousands of contractors and employees. Marketing collateral: Producing engaging voiceovers for promotional content and product demonstrations. Scalable production: Generating content without the logistics and cost of traditional voice recording. Hume's voice design also proved ideal for GAF. The platform's natural, expressive voices maintain the authoritative yet approachable tone that GAF needs to communicate with contractors, retailers, and customers. Unlike synthetic voices that can sound robotic or overly casual, Hume's TTS technology delivers the polished, trustworthy quality expected from an industry leader.
Hume AI powers conversational learning with Coconote
While traditional note-taking apps require students to manually scroll and search through content, Coconote is creating interactive study experiences through conversational AI. Coconote’s voice chat feature, powered by Hume's EVI, helps users transform static notes into dynamic conversations. Students can: Ask natural questions about their lecture content Receive contextual explanations referencing specific notes, and Engage in quiz-style conversations for active learning—all through natural voice interaction.
Enterprise Ready
Built for business
Deploy with confidence knowing Octave meets the security, compliance, and scale requirements of enterprise applications.
Contact salesSOC 2 Type II
Enterprise-grade security with industry-leading practices.
HIPAA compliant
Build healthcare applications with confidence.
Enterprise plans
Custom SLAs, dedicated support, and volume pricing.
FAQ
Frequently asked questions
Start generating with Octave
Create expressive, natural speech in seconds. Free to start, scales with you.