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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

NovaSynth serves as an online platform designed for the evaluation of voice and chat AI agents. By establishing a connection through methods such as phone calls, LiveKit, or HTTP Chat, developers and QA teams can create distinct synthetic caller personas and outline various conversational scenarios. The platform allows for both individual and batch tests that can simulate interruptions, background noise, accents, and other unusual conditions. Additionally, NovaSynth captures recordings of sessions and traces, providing transcripts and evaluation results that teams can analyze to pinpoint failures and compare outcomes following any modifications to the agent. It facilitates thorough evaluation and regression testing both prior to and following deployment. The service operates on a credit-based system: users on the free plan receive 2,500 credits monthly, while the Pro version begins at $69 per month and includes 10,000 credits. Voice calls consume 100 credits per minute, text interactions utilize 12 credits each, and evaluations may require extra credits. To conduct testing, teams must set up an account and ensure they have a properly configured and accessible agent connection. Furthermore, this structured approach not only enhances the efficiency of testing but also aids in refining AI performance over time.

API Access

Has API Yes 

API Access

Has API Yes 

Screenshots View All

Screenshots View All

Integrations

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

Integrations

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

Pricing Details

No price information available.
Free Trial No 
Free Version No 

Pricing Details

$69/month
The free plan includes 2,500 shared credits per month. Pro costs $69/month and includes 10,000 credits per month. Voice calls use 100 credits per minute, and text conversations use 12 credits each. Some evaluation checks consume additional credits. One-time credit packs are available and do not expire.
Free Trial No 
Free Version Yes 

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

Noveum

Founded

2023

Country

United States

Website

noveum.ai/en/novasynth

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

No Alternatives