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features
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support

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Description

Gemini 3.8 Flash TTS is a generative text-to-speech model from Google designed for expressive voice creation, character design, dialogue direction, and multilingual audio production. Instead of limiting users to fixed voice presets, the model can create entirely new vocal identities from natural-language descriptions. Developers and creators can specify attributes such as accent, role, timbre, speaking style, pacing, and other voice characteristics across more than 100 languages and dialects. The model also offers access to more than 2,000 production-ready voices and supports voice replication from a short authorized audio sample. Performance controls allow users to direct individual lines with stage directions, pacing instructions, dialect shifts, emotional cues, and conversational backchanneling. Gemini 3.8 Flash TTS supports long-form generation while maintaining voice consistency, making it suitable for podcasts, audiobooks, localization, and other extended audio projects. Native two-speaker scene support lets users create multi-turn conversations from a single script while preserving distinct voices and natural turn-taking. Google includes consent verification, SynthID watermarking, and C2PA credentials to provide greater transparency and safeguards around generated and replicated voices. Gemini 3.8 Flash TTS can be used through Google AI Studio and the Gemini API and is intended for developers, creators, enterprises, media companies, and teams building expressive speech experiences.

Description

StepAudio 3 represents the latest advancement in StepFun's audio model series, designed to comprehend, produce, and engage through various auditory forms including voice, sound, and music. This family features several specialized models: StepAudio 3 Realtime for seamless full-duplex dialogue, StepAudio 3 ASR for accurate speech recognition, StepAudio 3 TTS for effective speech synthesis, StepAudio 3 Gen for versatile audio generation, and StepAudio 3 Music for creating extended musical pieces. The Realtime model employs a continuous cycle of listening, conversing, thinking, and acting, adeptly interpreting not just spoken words but also nuances such as hesitation, laughter, emotions, pauses, backchannels, and interruptions. Unlike traditional systems, it can process information while articulating responses, tackle complex inquiries without disrupting the conversation, and utilize tools to fulfill tasks once it grasps the user's intent. Moreover, StepAudio 3 Gen integrates various functions like zero-shot TTS, voice design, vocal generation, sound effects, and mixed audio generation into a single cohesive framework, whereas StepAudio 3 Music allows for the creation of text-controlled songs, instrumental pieces, and vocal arrangements, making it a comprehensive tool for audio creativity. This innovative collection emphasizes the blend of interaction and creativity, pushing the boundaries of what audio models can achieve.

API Access

Has API Yes 

API Access

Has API No 

Screenshots View All

Screenshots View All

Integrations

Gemini Yes 
Gemini 3.1 Flash-Lite Yes 
Gemini 3.1 Pro Yes 
Gemini 3.5 Pro Yes 
Gemini Enterprise Yes 
Gemini Enterprise Agent Platform Yes 
Gemini Live API Yes 
Gemini Notebook Yes 
Google AI Studio Yes 
Google Vids Yes 
SynthID Yes 

Integrations

Gemini No 
Gemini 3.1 Flash-Lite No 
Gemini 3.1 Pro No 
Gemini 3.5 Pro No 
Gemini Enterprise No 
Gemini Enterprise Agent Platform No 
Gemini Live API No 
Gemini Notebook No 
Google AI Studio No 
Google Vids No 
SynthID No 

Pricing Details

No price information available.
Free Trial No 
Free Version No 

Pricing Details

No price information available.
Free Trial No 
Free Version No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Vendor Details

Company Name

Google

Founded

1998

Country

United States

Website

google.com

Vendor Details

Company Name

StepFun

Country

United States

Website

static.stepfun.com/blog/stepaudio3/

Product Features

Text to Speech

API No 
Adjust Speaking Rate / Pitch No 
Audio Optimization No 
Custom Lexicons No 
Different Voice Choices No 
Multi-Language Support No 
Synchronize Speech No 

Product Features

Alternatives

Alternatives

Seed-Music Reviews

Seed-Music

ByteDance