Forward Future Tools Library
Octave TTS
Octave generates context-aware, emotionally expressive speech for developers, podcasters, game studios, and teams building conversational voice applications.
Try Octave TTS →
hume.ai·Free + paid plans·Checked 2026-08-28
›What is Octave TTS?
Octave is Hume AI's text-to-speech system, designed to use the meaning and context of text when generating speech. Users can direct delivery with prompts, create and use cloned voices, and produce speech with varied emotional expression. It is available through paid plans with usage-based character limits and API access.
›What are the pros and cons of Octave TTS?
Strengths
Uses text context to shape more appropriate pacing, tone, and delivery
Offers extensive expressive control through emotion categories and voice descriptors
Includes unlimited voice cloning and use on listed subscription tiers
Supports both creative narration and conversational voice applications
Provides a free plan with 10,000 included TTS characters per month
Trade-offs
Additional TTS usage is billed per character, so high-volume projects can incur overage costs
Request-per-minute limits vary by plan, from 15 on Free and Starter to 225 on Enterprise
Voice access through the API is listed only for Enterprise in the pricing table
Octave and EVI are closed-source, which does not suit projects requiring open-source licensing
›What are Octave TTS’s key features?
Generates speech that reflects the meaning and context of the input text
Supports expressive delivery across 48 emotion categories and 600+ voice descriptors
Creates and uses cloned voices
Uses detailed prompts to guide voice identity, tone, and delivery
Offers API access for voice application development
Provides request-per-minute limits that vary by subscription tier
›What are the best use cases for Octave TTS?
Producing podcast narration and voiceovers with directed emotional delivery
Creating audiobook or other long-form narrative speech
Building conversational voice assistants and customer-support agents
Giving game characters dynamic voices and emotional reactions
Evaluating expressive TTS models in voice AI research
›What is the pricing for Octave TTS?
| Plan | Price | Details |
|---|---|---|
| Free | $0 / month | Includes 10,000 TTS characters, about 10 minutes, with a 15 RPM limit. |
| Starter | $3 / month | Includes 30,000 TTS characters, about 30 minutes, with a 15 RPM limit. |
| Creator | $7 / month | Includes 140,000 TTS characters, about 140 minutes, with a 75 RPM limit. |
| Pro | $70 / month | Includes 1,000,000 TTS characters, about 1,000 minutes, with a 75 RPM limit. |
| Scale | $200 / month | Includes 3,300,000 TTS characters, about 3,300 minutes, with a 150 RPM limit. |
| Business | $500 / month | Includes 10,000,000 TTS characters, about 10,000 minutes, with a 225 RPM limit. |
| Enterprise | Custom | Includes as much TTS usage as needed, with custom pricing and limits. |
Additional TTS characters are usage-based, with listed rates ranging from $0.15/1,000 to $0.05/1,000 by tier. Creator is shown as $7 / month, $14 / month, with the first month 50% off.
Checked 2026-08-28 · source
›Who is Octave TTS best for?
developersA strong fit for developers building expressive voice assistants, conversational agents, or API-based voice features.
podcastersUseful for narration and voiceovers where emotional direction and consistent voice identity matter.
game studiosGame teams can use its voice descriptors and emotional controls for character dialogue.
voice AI researchersSupports researchers working on expressive TTS, model comparisons, and human evaluation.
Not for
- Teams producing simple, neutral TTS where emotional control is unnecessary
- Budget-constrained projects with high-volume generation and frequent overages
- Organizations that require open-source TTS or open-source licensing
›What are the best Octave TTS alternatives?
Wondercraft AIChoose this instead if the main goal is producing podcast-like audio content with AI-generated voices.→
PodLM AI Podcast GeneratorChoose this instead if you want an AI tool focused on generating complete podcast content rather than integrating expressive speech into an application.→
Ace StudioChoose this instead if voice production is part of a broader video-production workflow.→
AudioCleaner AI→