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About

Realtime TTS-2 from Inworld AI is a new generation of voice model built for real-time conversation: a voice model that feels as human as it sounds. It hears the full audio of an exchange, picks up the user’s tone, pacing, and emotional state, then takes voice direction in plain English, the way developers prompt an LLM. Instead of generating speech in isolation, it listens to prior turns of the exchange, so tone and pacing carry forward, and the same line can land differently after a joke than after bad news. Voice Direction lets developers steer delivery like a director would steer a voice actor, using natural-language descriptions rather than fixed emotion presets or sliders. Inline nonverbals like [sigh], [breathe], and [laugh] can be placed inside the text, and the model renders them as audio events. Realtime TTS-2 preserves one voice identity across more than 100 languages, including mid-utterance language switches.

About

UntitledPen is an AI-powered platform that enables users to write, refine, and instantly transform text into realistic, human-like voice‑overs using advanced GPT-based audio generation. It features a notetaking-style smart editor and smart writing assistant to generate scripts, refine text, or polish content in any language. Users can convert text to speech or speech to text, choose from a range of voices, and customize tone, accent, and personality. Quick commands streamline writing and audio creation, while built‑in voice editing tools allow lightweight adjustments. With support for natural voice output suitable for podcasts, videos, presentations, and more, the platform includes audio download and upload options, along with smart transcription for turning speech into polished text. UntitledPen is currently in open beta and invites users to try its capabilities for free.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

Voice AI developers building realtime agents, characters, tutors, support systems, and companions that need emotionally aware, multilingual, humanlike speech

Audience

Content creators and educators searching for a solution to generate and customize natural-sounding voice-overs from scripts

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

$25 per month
Free Version
Free Trial

Pricing

$12 per month
Free Version
Free Trial

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

Inworld
Founded: 2021
United States
inworld.ai/blog/realtime-tts-2

Company Information

UntitledPen
United States
www.untitledpen.com

Alternatives

Inworld TTS

Inworld TTS

Inworld

Alternatives

Voisi

Voisi

Teknikforce
Fish Audio

Fish Audio

Hanabi AI
Azure AI Speech

Azure AI Speech

Microsoft

Categories

Categories

Integrations

ChatGPT
Alloy
Claude
Gemini
Grok
Perplexity

Integrations

ChatGPT
Alloy
Claude
Gemini
Grok
Perplexity
Claim Realtime TTS-2 and update features and information
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